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Sample records for wall parameters die

  1. Analysis of the Causes of Cracks in a Thick-Walled Bush Made of Die-Cast Aluminum Bronze

    Directory of Open Access Journals (Sweden)

    Pisarek B.P.

    2016-12-01

    Full Text Available For the die casting conditions of aluminium bronzes assumed based on the literature data, a thick-walled bush was cast, made of complex aluminium bronze (Cu-Al-Fe-Ni-Cr. After the cast was removed from the mould, cracks were observed inside it. In order to identify the stage in the technological production process at which, potentially, the formation of stresses damaging the continuity of the microstructure created in the cast was possible (hot cracking and/or cold cracking, a computer simulation was performed. The article presents the results of the computer simulation of the process of casting the material into the gravity die as well as solidifying and cooling of the cast in the shape of a thick-walled bush. The simulation was performed with the use of the MAGMA5 program and by application of the CuAl10Ni5,5Fe4,5 alloy from the MAGMA5 program database. The results were compared with the location of the defects identified in the actual cast. As a result of the simulation of the die-casting process of this bush, potential regions were identified where significant principal stresses accumulate, which can cause local hot and cold cracking. Until now, no research has been made of die-cast aluminium bronzes with a Cr addition. Correlating the results of the computer simulation validated by the analysis of the actual cast made it possible to clearly determine the critical regions in the cast exposed to cracking and point to the causes of its occurrence. Proposals of changes in the bush die casting process were elaborated, in order to avoid hot tearing and cold cracking. The article discusses the results of preliminary tests being a prologue to the optimization of the die-casting process parameters of complex aluminium bronze thick-walled bushs.

  2. Heating comes from the walls in Trebsen Castle; EWS: In Schloss Trebsen heizen die Waende

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1999-01-01

    Wall temperature control is an alternative to the usual methods of indoor heating and moisture proofing in historical monuments. It is largely effected by warm water pipes running in the outer walls or by skirting board pipes which are laid throughout the foundations and along the perimeters of all storeys. In particularly critical places such as thermal bridges at windows and doors skirting board pipes can be supplemented by other pipes as necessary. This paper presents the advantages of wall temperature control for the example of Trebsen Castle. [Deutsch] Die Wand-Temperierung ist eine Alternative zu den ueblichen Methoden der Gebaeudebeheizung und des Feuchteschutzes denkmalgeschuetzter Gebaeude. Sie wirkt im wesentlichen ueber Warmwasser-Heizrohre in den Aussenwaenden oder Sockelleisten-Rohre, die an allen Fundamenten und aeusseren Stockwerksgrenzen auf der ganzen Laenge verlegt werden und bei Bedarf durch weitere Heizrohre an besonders kritischen Stellen, wie Waermebruecken an Fenstern und Tueren, ergaenzt werden. Die Vorteile der Wandtemperierung, speziell fuer das Schloss Trebsen werden vorgestellt. (orig./MSK)

  3. [Influence of compression pressure and die-wall pressure on tablet sticking].

    Science.gov (United States)

    Kakimi, Kazuyuki; Niwa, Toshiyuki; Danjo, Kazumi

    2011-04-01

    An eccentric-type tablet machine fitted with 8-mm-diameter flat-faced punches was used to measure the forces of upper and lower punches, die-wall pressure, tablet ejection force, and scraper pressure (SCR), a type of shear stress, to evaluate sticking behavior. The shear stress between the surfaces of the tablet and lower punch was determined using an SCR detection system. Mean surface roughness (R(a)) of tablets, measured by laser scanning microscopy, was used to estimate the magnitude of sticking. Tablet tensile strength tended to increase with compression pressure, which is consistent with previous reports. SCR decreased with increasing compression pressure for samples at all formulations (i.e., for different kinds and percentages of lubricant). R(a) associated with sticking increased with SCR, indicating that the adhesive force between the particles of the tablet surface and the lower punch surface plays an important role in sticking. Multiple linear regression analysis with SCR as the response variable was conducted. Upper and lower punch force, die-wall pressure, tablet ejection force, SCR, percentage of lubricant, and tensile strength of tablet were selected as explanatory variables. Results of this analysis indicate that the incidence of sticking decreased when either the lower punch force or die-wall pressure increased, where, of these two, increasing the lower punch force had a stronger effect on decreasing SCR.

  4. Application of Support Vector Machines for Estimating Wall Parameters in Through-Wall Radar Imaging

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    Hua-Mei Zhang

    2015-01-01

    Full Text Available In through-wall radar imaging (TWRI, ambiguities in wall characteristics including the thickness and the relative permittivity will distort the image and shift the imaged target position. To quickly and accurately estimate the wall parameters, an approach based on a support vector machine (SVM is proposed. In TWRI problem, the nonlinearity is embodied in the relationship between backscatter data and the wall parameters, which can be obtained through the SVM training process. Measurement results reveal that once the training phase is completed, the technique only needs no more than one second to estimate wall parameters with acceptable errors. Then through-wall images are reconstructed using a back-projection (BP algorithm by a finite-difference time-domain (FDTD simulation. Noiseless and noisy measurements are discussed; the simulation results demonstrate that noisy contamination has little influence on the imaging quality. Furthermore, the feasibility and the validity are tested by a more realistic situation. The results show that high-quality and focused images are obtained regardless of the errors in the wall parameter estimates.

  5. Evolution of the Die-Wall Pressure during the Compression of Biconvex Tablets: Experimental Results and Comparison with FEM Simulation.

    Science.gov (United States)

    Mazel, Vincent; Diarra, Harona; Busignies, Virginie; Tchoreloff, Pierre

    2015-12-01

    Capping is a classical manufacturing problem for tablets, which is known to affect more biconvex tablets than flat-faced ones. One reason could be the development of a higher residual die-wall pressure during unloading. Unfortunately, contradictory results were published on the subject. In this work, the evolution of the die-wall pressure during the compaction of biconvex tablets was studied experimentally and using finite element method (FEM) modeling. It was compared with the case of flat-faced tablets. Experimental and numerical results showed that during the compression of biconvex tablet, a lower maximum die-wall pressure and a higher residual die-wall pressure were obtained compared with the case of flat-faced tablet. Moreover, both approaches showed, for biconvex tablets, a temporary increase of the die-wall pressure at the end of the unloading phase. FEM demonstrated that this phenomenon was due to a gradual loss of contact between the punch and the tablet from the side to the center. This complex unloading behavior causes the temporary increase of the die-wall pressure and the development of a shear stress between the convex part and the land of the tablet. This could explain the capping tendency of biconvex tablets. © 2015 Wiley Periodicals, Inc. and the American Pharmacists Association.

  6. Development of Integrated Die Casting Process for Large Thin-Wall Magnesium Applications

    Energy Technology Data Exchange (ETDEWEB)

    Carter, Jon; Wang, Gerry; Luo, Alan

    2017-11-29

    The purpose of this project was to develop a process and product which would utilize magnesium die casting and result in energy savings when compared to the baseline steel product. The specific product chosen was a side door inner panel for a mid-size car. The scope of the project included: re-design of major structural parts of the door, design and build of the tooling required to make the parts, making of parts, assembly of doors, and testing (both physical and simulation) of doors. Additional work was done on alloy development, vacuum die casting, and overcasting, all in order to improve the performance of the doors and reduce cost. The project achieved the following objectives: 1. Demonstrated ability to design a large thin-wall magnesium die casting. 2. Demonstrated ability to manufacture a large thin-wall magnesium die casting in AM60 alloy. 3. Tested via simulations and/or physical tests the mechanical behavior and corrosion behavior of magnesium die castings and/or lightweight experimental automotive side doors which incorporate a large, thin-wall, powder coated, magnesium die casting. Under some load cases, the results revealed cracking of the casting, which can be addressed with re-design and better material models for CAE analysis. No corrosion of the magnesium panel was observed. 4. Using life cycle analysis models, compared the energy consumption and global warming potential of the lightweight door with those of a conventional steel door, both during manufacture and in service. Compared to a steel door, the lightweight door requires more energy to manufacture but less energy during operation (i.e., fuel consumption when driving vehicle). Similarly, compared to a steel door, the lightweight door has higher global warming potential (GWP) during manufacture, but lower GWP during operation. 5. Compared the conventional magnesium die casting process with the “super-vacuum” die casting process. Results achieved with cast tensile bars suggest some

  7. Investigating the effect of particle size and shape on high speed tableting through radial die-wall pressure monitoring.

    Science.gov (United States)

    Abdel-Hamid, Sameh; Alshihabi, Firas; Betz, Gabriele

    2011-07-15

    Investigating particle properties such as shape and size is important in understanding the deformation behavior of powder under compression during tableting. Particle shape and size control the pattern of powder rearrangement and interaction in the die and so the final properties of the compact. The aim of this study was to examine the effect of particle size and shape on compactability. Particle friction and adhesion were investigated through radial die-wall (RDW) pressure monitoring. To fulfill this aim, powders and granules of different sizes and shapes of materials with different compaction behaviors were used. Compaction simulation using the Presster with an instrumented die was applied. Small particle size increased residual die-wall pressure (RDP) and maximum die-wall pressure (MDP) (pparticle size had an opposite effect. No effect was found on brittle material, however big particle size showed higher friction for such materials. Regarding morphology, fibrous elongated particles of microcrystalline cellulose had less friction tendency to the die-wall in comparison to rugged surface mannitol particles. RDW pressure monitoring is a useful tool to understand the compactability of particles in respect to size and shape. Copyright © 2011 Elsevier B.V. All rights reserved.

  8. Technological parameters of die casting and quality of casting from EN AC46500 alloy

    Directory of Open Access Journals (Sweden)

    Š. Gašpár

    2016-07-01

    Full Text Available Die casting represents the highest technological level of metal mold casting. This technology enables production of almost all final products without necessity of further processing. The important aspect of efficiency and production is a proper casting parameters setting. In the submitted paper following die casting parameters are analyzed: plunger pressing speed and pressure. The studied parameters most significantly affect a qualitative of castings from EN AC46500 alloy and they influence the most a gained porosity level as well as basic mechanical properties represented by permanent deformations.

  9. Consolidation of titanium hydride powders during the production of titanium PM parts: The effect of die wall lubricants

    CSIR Research Space (South Africa)

    Machio, Christopher N

    2015-11-01

    Full Text Available 90 (2016) 757–766 Consolidation of titanium hydride powders during the production of titanium PM parts: The effect of die wall lubricants C. Machio ⁎, R. Machaka, H.K. Chikwanda CSIR Materials Science and Manufacturing, Light Metals, PO Box...

  10. Flow analysis and validation of numerical modelling for a thin walled high pressure die casting using SPH

    Science.gov (United States)

    Cleary, Paul W.; Savage, Gary; Ha, Joseph; Prakash, Mahesh

    2014-09-01

    High pressure die casting (HPDC) is an important process for high throughput manufacturing of complex shaped metallic components. The flow involves significant fragmentation and spray formation as the high pressure liquid jets into the die from the gate system. An important class of die cast components is one with large areas of thin walls. An example of this is the chassis of the laptop computer. Computational modelling provides an opportunity to both better understand the filling process and to optimize the runner, gates, flash overs and venting systems for the die. SPH has previously been found to be very suitable for predicting HPDC for bulkier automotive components. The modelling challenges arising from the very thin sections and the many flow paths in a laptop chassis require careful validation. A water analogue experiment is used to validate the predictions of the SPH model for this representative thin walled casting. SPH predictions are used to understand and characterise the filling process. Finally, comparison of flow lines visible in an etched finished casting with the high speed flow paths in the final filled SPH model show very strong agreement. Together these demonstrate that such an SPH model is able to capture substantial detail from both the water analogue system and the actual casting process and is very suitable for simulating these types of complex thin walled castings.

  11. Design parameters and methodology for mechanically stabilized earth (MSE) walls.

    Science.gov (United States)

    2014-10-01

    Since its appearance in 1970s, mechanically stabilized earth (MSE) walls have become a majority among all types of retaining walls due to their economics and satisfactory performance. The Texas Department of Transportation (TxDOT) has primarily adopt...

  12. Multi-objective optimization of swash plate forging process parameters for the die wear/service life improvement

    Science.gov (United States)

    Hu, X. F.; Wang, L. G.; Wu, H.; Liu, S. S.

    2017-12-01

    For the forging process of the swash plate, the author designed a kind of multi-index orthogonal experiment. Based on the Archard wear model, the influences of billet temperature, die temperature, forming speed, top die hardness and friction coefficient on forming load and die wear were numerically simulated by DEFORM software. Through the analysis of experimental results, the best forging process parameters were optimized and determined, which could effectively reduce the die wear and prolong the die service life. It is significant to increase the practical production of enterprise, especially to reduce the production cost and to promote enterprise profit.

  13. Parameterryke onvoorwaardelike verdelings met ’n stogastiese parameter in die voorwaardelike gammaverdeling

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    A. Bekker

    1991-07-01

    Full Text Available Hier word veronderskei dat die skaalparameter in die tweeparameter-gammaverdeling (as voorwaardelike verdeling 'n funksie van 'n variaat is. Hierdie stogastiese skaalparameter word bepaal deur die vorm wat die regressiekromme kan aanneem. Vir die regressiefunksies ay en a/y word parameterryke onvoorwaardelike verdelings met die tweeparameter-gammaverdeling as vermengingsverdeling afgelei. 'n Veralgemeende verdeling word as vermengingsverdeling gebruik om ’n wye klas van onvoorwaardelike verdelings af te lei, met verryking teweeggebring deur regressieparameters.

  14. Influence of waste managemental and technical planning parameters on plant costs; Einfluss abfallwirtschaftlicher und technischer Plannungsgroessen auf die Anlagenkosten

    Energy Technology Data Exchange (ETDEWEB)

    Beckmann, R. [Inst. fuer Umwelt, Sicherheits- und Energietechnik e.V., Oberhausen (Germany)

    1998-09-01

    The probable future costs of thermal waste treatment depend on a great number of influencing factors. One of the essential aims of the present contribution is to elaborate and present the sensitivity of costs to various parameters. [Deutsch] Die zukuenftig zu erwartenden Kosten der thermischen Abfallbehandlung haengen von einer Vielzahl von Einflussgroessen ab. Im Rahmen des Beitrags besteht daher ein wesentliches Ziel darin, die Sensitivitaet der Kosten hinsichtlich verschiedenster Parameter herauszuarbeiten und darzustellen. (orig./SR)

  15. Historic Low Wall Detection via Topographic Parameter Images Derived from Fine-Resolution DEM

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    Hone-Jay Chu

    2017-11-01

    Full Text Available Coral walls protect vegetation gardens from strong winds that sweep across Xiji Island, Taiwan Strait for half the year. Topographic parameters based on light detection and ranging (LiDAR-based high-resolution digital elevation model (DEM provide obvious correspondence with the expected form of landscape features. The information on slope, curvature, and openness can help identify the location of landscape features. This study applied the automatic landscape line detection to extract historic vegetable garden wall lines from a LiDAR-derived DEM. The three rapid processes used in this study included the derivation of topographic parameters, line extraction, and aggregation. The rules were extracted from a decision tree to check the line detection from multiple topographic parameters. Results show that wall line detection with multiple topographic parameter images is an alternative means of obtaining essential historic wall feature information. Multiple topographic parameters are highly related to low wall feature identification. Furthermore, the accuracy of wall feature detection is 74% compared with manual interpretation. Thus, this study provides rapid wall detection systems with multiple topographic parameters for further historic landscape management.

  16. Optimization of Processing Parameters in ECM of Die Tool Steel Using Nanofluid by Multiobjective Genetic Algorithm

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    V. Sathiyamoorthy

    2015-01-01

    Full Text Available Formation of spikes prevents achievement of the better material removal rate (MRR and surface finish while using plain NaNO3 aqueous electrolyte in electrochemical machining (ECM of die tool steel. Hence this research work attempts to minimize the formation of spikes in the selected workpiece of high carbon high chromium die tool steel using copper nanoparticles suspended in NaNO3 aqueous electrolyte, that is, nanofluid. The selected influencing parameters are applied voltage and electrolyte discharge rate with three levels and tool feed rate with four levels. Thirty-six experiments were designed using Design Expert 7.0 software and optimization was done using multiobjective genetic algorithm (MOGA. This tool identified the best possible combination for achieving the better MRR and surface roughness. The results reveal that voltage of 18 V, tool feed rate of 0.54 mm/min, and nanofluid discharge rate of 12 lit/min would be the optimum values in ECM of HCHCr die tool steel. For checking the optimality obtained from the MOGA in MATLAB software, the maximum MRR of 375.78277 mm3/min and respective surface roughness Ra of 2.339779 μm were predicted at applied voltage of 17.688986 V, tool feed rate of 0.5399705 mm/min, and nanofluid discharge rate of 11.998816 lit/min. Confirmatory tests showed that the actual performance at the optimum conditions was 361.214 mm3/min and 2.41 μm; the deviation from the predicted performance is less than 4% which proves the composite desirability of the developed models.

  17. Optimization of Processing Parameters in ECM of Die Tool Steel Using Nanofluid by Multiobjective Genetic Algorithm.

    Science.gov (United States)

    Sathiyamoorthy, V; Sekar, T; Elango, N

    2015-01-01

    Formation of spikes prevents achievement of the better material removal rate (MRR) and surface finish while using plain NaNO3 aqueous electrolyte in electrochemical machining (ECM) of die tool steel. Hence this research work attempts to minimize the formation of spikes in the selected workpiece of high carbon high chromium die tool steel using copper nanoparticles suspended in NaNO3 aqueous electrolyte, that is, nanofluid. The selected influencing parameters are applied voltage and electrolyte discharge rate with three levels and tool feed rate with four levels. Thirty-six experiments were designed using Design Expert 7.0 software and optimization was done using multiobjective genetic algorithm (MOGA). This tool identified the best possible combination for achieving the better MRR and surface roughness. The results reveal that voltage of 18 V, tool feed rate of 0.54 mm/min, and nanofluid discharge rate of 12 lit/min would be the optimum values in ECM of HCHCr die tool steel. For checking the optimality obtained from the MOGA in MATLAB software, the maximum MRR of 375.78277 mm(3)/min and respective surface roughness Ra of 2.339779 μm were predicted at applied voltage of 17.688986 V, tool feed rate of 0.5399705 mm/min, and nanofluid discharge rate of 11.998816 lit/min. Confirmatory tests showed that the actual performance at the optimum conditions was 361.214 mm(3)/min and 2.41 μm; the deviation from the predicted performance is less than 4% which proves the composite desirability of the developed models.

  18. Influence of capillary die geometry on wall slip of highly filled powder injection molding compounds

    Czech Academy of Sciences Publication Activity Database

    Sanétrník, D.; Hausnerová, B.; Filip, Petr; Hnátková, E.

    2018-01-01

    Roč. 325, February (2018), s. 615-619 ISSN 0032-5910 R&D Projects: GA ČR GA17-26808S Grant - others:Ministerstvo školství, mládeže a tělovýchovy (MŠMT)(CZ) LO1504 Institutional support: RVO:67985874 Keywords : powder injection molding * highly filled polymer * wall slip * capillary entrance angle Subject RIV: BK - Fluid Dynamics Impact factor: 2.942, year: 2016

  19. Multi criteria decision making of machining parameters for Die Sinking EDM Process

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    G. K. Bose

    2015-04-01

    Full Text Available Electrical Discharge Machining (EDM is one of the most basic non-conventional machining processes for production of complex geometries and process of hard materials, which are difficult to machine by conventional process. It is capable of machining geometrically complex or hard material components, that are precise and difficult-to-machine such as heat-treated tool steels, composites, super alloys, ceramics, carbides, heat resistant steels etc. The present study is focusing on the die sinking electric discharge machining (EDM of AISI H 13, W.-Nr. 1.2344 Grade: Ovar Supreme for finding out the effect of machining parameters such as discharge current (GI, pulse on time (POT, pulse off time (POF and spark gap (SG on performance response like Material removal rate (MRR, Surface Roughness (Ra & Overcut (OC using Square-shaped Cu tool with Lateral flushing. A well-designed experimental scheme is used to reduce the total number of experiments. Parts of the experiment are conducted with the L9 orthogonal array based on the Taguchi methodology and significant process parameters are identified using Analysis of Variance (ANOVA. It is found that MRR is affected by gap current & Ra is affected by pulse on time. Moreover, the signal-to-noise ratios associated with the observed values in the experiments are determined by which factor is most affected by the responses of MRR, Ra and OC. These experimental data are further investigated using Grey Relational Analysis to optimize multiple performances in which different levels combination of the factors are ranked based on grey relational grade. The analysis reveals that substantial improvement in machining performance takes place following this technique.

  20. The Decreasing of Die Cracking for HDPC Technology by Changing Parameters of Heat Treatment

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    A. Herman

    2012-09-01

    Full Text Available In earlier works were described trends in the production of tools for die casting (hot work. Almost the entire set of issues dealt with may seem insignificant when incompletely assembled acceptance of the material and the associated risks of processing a material with an inappropriate structure, leading to a very early defect of the die. Therefore, further work will focus particularly on identifying the causes of thermal cracks and preventing a suitable choice of acceptance criteria conditions and heat treatment.

  1. Methods of Parametric Optimization of Thin-Walled Structures and Parameters which Influence on it

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    Kibkalo Anton

    2016-01-01

    Full Text Available The question of efficiency of thin-walled structures contains a number of contradictions. You need to select the best from all the existing structures on the criteria of optimization options. The search is conducted by varying of the parameters at parametric optimization. As a rule the aim of building structure optimization is reducing of material consumption, the labor input and cost. The costs of a particular variant of construction most full describes the given cost. There are two types of optimization parameters - immutable and varying. The result of the optimization of thin-walled beams will be a combination of parameters for each design situation in which provides the required strength and the minimum of the objective function - factory cost of production

  2. Effects of Material Rheology and Die Walls Translational Motions on the Dynamics of Viscous Flow during Equal Channel Angular Extrusion through a Segal 2θ-Die: CFD 2D Solution of a Curl Transfer Equation

    Directory of Open Access Journals (Sweden)

    Alexander V. Perig

    2017-01-01

    Full Text Available The present article is focused on a phenomenological description of a polymer workpiece Equal Channel Angular Extrusion (ECAE through 2θ-dies of Segal and Iwahashi geometries with a channel intersection angle 2θ = 105° with fixed and movable external inlet and outlet die walls. The local flow dynamics, including the formation of macroscopic rotation and a dead zone appearance during the flow of plasticine, paraffin, and wax workpiece models through the subject die configuration was studied using physical simulation techniques. The present article utilizes a Computational Fluid Dynamics (CFD numerical approach to a theoretical description of 2D viscous flow of incompressible Newtonian continuum through the stated die geometries. The boundary value problem for the Navier-Stokes equations in the curl transfer form for the local viscous flow was formulated and numerically solved with a finite-difference method. Theoretical CFD-derived plots with computational flow lines, dimensionless flow and curl functions, flow velocities, and tangential stresses for viscous material flow through the stated die geometries have been generated and described. As a first rheological approximation the derived computational results provide the theoretical description of physical simulation experiments and visualize the formation of ECAE-induced rotational modes of large deformations like macroscopic rotation and rotational inhomogeneity.

  3. State stiffness parameters of the vascular wall in hypertensive patients complex therapy cytoprotector and sartans

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    V. P. Mikhin

    2015-01-01

    Full Text Available A randomized study of the state of stiffness parameters arteries wall (CAVI — cardio-ankle vascular index, AI (augmentation index PEP (duration of the voltage of the left ventricle using «VaSera-1000» («Fukuda Denshi», Japan in primary hypertension patients (80 not treated with systemic antihypertensive therapy. The effect of long-term (3 months was be marketed. Losartan combined with Mexicor 300mg/day or mildronate 1000 mg/day for the specified parameters. It sets the initial reduction the properties of the arterial wall in patients with hypertension, in contrast to healthy individuals. Mexicor or mildronat accompanied by improvement east-cal properties of the arterial wall, reducing CAVI and AI in 3 months on 9.4% and 8.9%, 14.9% and 15.4%, respectively. In the control group-term change CAVI and AI no. Mexicor led to a more pronounced increase in PEP, than mildronate, respectively, on 23.7% and 18.9%. Losartan monotherapy results in a less pronounced decrease in the stiffness of the vessel wall.

  4. Optimization of process parameters in the RF-DC plasma N2-H2 for AISI420 molds and dies

    Science.gov (United States)

    Herdianto, Hengky; Djoko, D. J.; Santjojo, H.; Masruroh

    2017-11-01

    The RF-DC plasma N2-H2 was used to make precise AISI420 molds and dies have complex textured geometry. The quality of the molds and dies directly affect the quality of the produced parts. The excellent examples of molds were used for injection molding lenses and dies used for the precision forging of automotive drive train components. In this study, a temperature, DC bias, and duration as process parameters of the RF-DC plasma N2-H2 have been optimized for molds and dies fabrication. The mask-less micro-patterned method was utilized to draw the initial 2D micro patterns directly onto the AISI420 substrate surface. The unprinted substrate surfaces were selectively nitrided by the RF-DC plasma N2-H2 at 673 K for 5400 s by 70 Pa with hollow cathode device. Energy Dispersive X-ray was utilized to describe the nitrogen content distribution at the vicinity of the border between the unprinted surfaces. This exclusive nitrogen mapping proves that only the unprinted parts of the substrate have high content nitrogen solutes. XRD analysis was performed to investigate whether the iron nitrides were precipitated by RF-DC plasma N2-H2 in the AISI420.

  5. Effect of Selected Parameters of Pressure Die Casting on Quality of AlSi9Cu3 Castings

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    Pałyga Ł.

    2015-06-01

    Full Text Available This paper presents the results on the effects of die-casting process on the strength parameters of castings of the aluminium AlSi9Cu3 alloy belonging to the group of EN AB-46000, made on renovated high pressure die-casting machine. Specimens for quality testing were taken from the places of the casting most loaded during the service. The aim of a research was to prove how the new die-casting process control capabilities influence on the tensile strength of the cast material defined as a value of the breaking force of the specimens. It has been found that it is possible to specify a set of recommended settings valves of second (II and third (III phase, which are responsible for filling the metal mould on die-casting pressure machine. From the point of view of the finished cast element, it was noticed that exceeding the prescribed values of valve settings does not bring further benefits and even causes unnecessary overload and reduce the durability of the mold. Moreover, it was noticed that reduction of the predetermined setting of the second phase (II valve leads to the formation of casting defects again.

  6. Synthesis of Single Wall Carbon Nanotubes by Plasma Arc: Role of Plasma Parameters

    Science.gov (United States)

    Farhart, Samir; Scott, Carl D.

    2000-01-01

    Single wall carbon nanotubes (SWNT) are porous objects on the molecular scale and have a low density, which gives them potential applications as adsorbent for molecular hydrogen. Their H2 absorption capacity published in the literature varies from 4 to 10% by mass according to the purity of the materials and storage conditions. Optimization of production methods of SWNTs should permit improving these new materials for storage of hydrogen. In this article, we show the potential of using SWNTs in hydrogen storage. In particular, we pose problems associated with synthesis, purification, and opening up of the nanotubes. We present an electric arc process currently used at laboratory scale to produce single wall carbon nanotubes. We discuss, in particular, operating conditions that permit growth of nanotubes and some plasma parameters that assure control of the material. Analysis of the process is carried out with the aid of local measurements of temperature and scanning and transmission electron microscopy of the materials.

  7. Effect of Surface Modification on the Hansen Solubility Parameters of Single-Walled Carbon Nanotubes

    DEFF Research Database (Denmark)

    Ma, Jing; Larsen, Mikael

    2013-01-01

    In this work, seven types of surface-modified single-walled carbon nanotubes (SWNTs) were studied by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy to investigate the functional groups and extent of functionalization. Hansen solubility parameters were determined based on observations...... of the sedimentation and swollen states of the SWNTs in solvents after ultrasonication, and the results were compared with the hydrodynamic sizes of the SWNTs evaluated by the dynamic light scattering method. We found that the solubility of SWNTs is related to their functional groups and degree of functionalization...

  8. Effect of Viscosity Measurement Method to Simulate High Pressure Die Casting of Thin-Wall AlSi10MnMg Alloy Castings

    Science.gov (United States)

    Zhu, B. W.; Li, L. X.; Liu, X.; Zhang, L. Q.; Xu, R.

    2015-12-01

    In the present study, a rotating cylinder viscometer (RCV) was adopted to measure the viscosity of AlSi10MnMg aluminum alloy. The results show that the measured viscosity is much higher than previously reported viscosity of aluminum alloys measured by oscillation vessel viscometer. The viscosity measured by RCV was introduced into the simulation of the filling progress of high pressure die casting (HPDC) for thin-walled castings of aluminum alloy (TWCA). The simulated results match well with the experimental results indicating that the RCV is the most appropriate to use for simulations of HPDC for TWCA.

  9. Taguchi analysis of parameters for small-diameter single wall carbon nanotube growth

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    DaeJin Kang

    2017-09-01

    Full Text Available Small diameter single wall carbon nanotubes are desirable for various physical and electrical properties of carbon nanotubes. Here, we report the sensitivities of parameters and the optimal conditions for small diameter carbon nanotube growth by chemical vapor deposition (CVD. These results were obtained using the Taguchi method, which is commonly used to find the optimal parameters of various processes. The possible parameter ranges given by the experimental equipment and laboratory conditions, we attempted several times to determine the proper ranges, using photoluminescence (PL imaging to determine the exact positions of suspended carbon nanotubes on the quartz substrates after synthesis. The diameters of the carbon nanotubes were then determined from the radial breathing modes (RBM using Raman spectroscopy with a 785nm wavelength laser. Among the 4 major parameters listed above, we concluded that the temperature was the most significant parameter in determining carbon nanotube diameter, hydrogen flow rate was the second most significant, the ethanol and argon gas flow rate was the third, and finally time was the least significant factor.

  10. Taguchi analysis of parameters for small-diameter single wall carbon nanotube growth

    Science.gov (United States)

    Kang, DaeJin; Yang, Sisi; Wang, Bo; Chen, Jihan; Dhall, Rohan; Hou, Bingya; Kang, Jimin; Cronin, Stephen B.

    2017-09-01

    Small diameter single wall carbon nanotubes are desirable for various physical and electrical properties of carbon nanotubes. Here, we report the sensitivities of parameters and the optimal conditions for small diameter carbon nanotube growth by chemical vapor deposition (CVD). These results were obtained using the Taguchi method, which is commonly used to find the optimal parameters of various processes. The possible parameter ranges given by the experimental equipment and laboratory conditions, we attempted several times to determine the proper ranges, using photoluminescence (PL) imaging to determine the exact positions of suspended carbon nanotubes on the quartz substrates after synthesis. The diameters of the carbon nanotubes were then determined from the radial breathing modes (RBM) using Raman spectroscopy with a 785nm wavelength laser. Among the 4 major parameters listed above, we concluded that the temperature was the most significant parameter in determining carbon nanotube diameter, hydrogen flow rate was the second most significant, the ethanol and argon gas flow rate was the third, and finally time was the least significant factor.

  11. Effect of Process Parameters, Casting Thickness, and Alloys on the Interfacial Heat-Transfer Coefficient in the High-Pressure Die-Casting Process

    Science.gov (United States)

    Guo, Zhi-Peng; Xiong, Shou-Mei; Liu, Bai-Cheng; Li, Mei; Allison, John

    2008-12-01

    The heat transfer at the metal-die interface is believed to have great influence on the solidification process and cast structure of the high-pressure die-casting (HPDC) process. The present article focused on the effects of process parameters, casting thickness, and alloys on the metal-die interfacial heat-transfer coefficient (IHTC) in the HPDC process. Experiment was carried out on a cold-chamber die-casting machine with two casting alloys AM50 and ADC12. A special casting, namely, “step-shape” casting, was used and cast against a H13 steel die. The IHTC was determined using an inverse approach based on the temperature measurements inside the die. Results show that the IHTC is different at different steps and changes as the solidification of the casting proceeds. Process parameters only influence the IHTC in its peak value, and for both AM50 and ADC12 alloys, a greater fast shot velocity leads to a greater IHTC peak value at steps 1 and 2. The initial die surface temperature has a more prominent influence on the IHTC peak values at the thicker steps, especially step 5. Results also show that a closer contact between the casting and die could be achieved when the casting alloy is ADC12 instead of AM50, which consequently leads to a higher IHTC.

  12. ’N ondersoek na parameters van prognostiese belang by die hoofbeseerde pasiënt

    Directory of Open Access Journals (Sweden)

    Margot Hugo

    1981-09-01

    Full Text Available The increase in accidents and accompanying increase in severe head injuries, have led to research into various aspects of parameters of prognostic value in patients suffering from head injuries. The possible prognostic value of the observations undertaken by nurses was researched by the author. Some of the findings regarding temperature, pulse rate, blood pressure, ventilation, pupillary response and the type of injury are discussed in this article. The importance of accurate observations by nurses is stressed.

  13. Solar wall heating and daylight use with transparent thermal insulation - the solar environmental wall; Solare Wandheizung und Tageslichtnutzung mit Transparenter Waermedaemmung - die Solare Umweltwand

    Energy Technology Data Exchange (ETDEWEB)

    Platzer, W. [Fachverband Transparente Waermedaemmung e.V., Gundelfingen (Germany)

    2005-07-01

    Construction with the sun means to open building walls for the sun. The building is supposed to benefit directly from daylight and solar heat. Special materials were developed for this purpose, which combine solar transmission and light transmission. They enable the transparent thermal insulation of buildings, abbreviated TWD. Their integration into the facade and the roof offer an intelligent and uncomplicated technology for the use of solar energy, the ''solar environmental wall''. TWD-materials can be used as filling material in various building components and they already constitute a weather-resistant wall. They are thermally-insulating structures or materials, which keep out the heat but allow the transmission of solar radiation and light. TWD-materials maintain their excellent insulating properties almost unchanged even in case of very cold outer temperatures or inclined construction in the roof area. In these cases the convection of components that are only filled with air or gas, can lead to considerable decreases of the U-value (according to DIN EN 673 up to 45%). Good TWD-materials are resistant against humidity, which enables to use them in non-hermetic systems, such as e.g. U-profile glas, too. (orig.)

  14. Micromagnetic simulation of domain wall propagation along meandering magnetic strip with spatially modulated material parameters

    Directory of Open Access Journals (Sweden)

    Z. Zhang

    2017-05-01

    Full Text Available Feasibility of two-dimensional propagation of the domain wall (DW was investigated by micromagnetic simulations. Successful bit-by-bit propagation of the DW was demonstrated in a designed meandering magnetic strip with periodic material parameter modulation, used as DW pinning sites (PSs. The DW was successively shifted along the straight part and around the corner with a spin polarized current pulses with 1 ns-width, 3 ns-interval and same amplitude. A practical current amplitude margin (30 % of mid value was achieved by analyzing the energy landscape around the meandering corner and optimizing the location of the PSs, which energy barrier height assures a thermal stability criterion (>60 kBT.

  15. Micromagnetic simulation of domain wall propagation along meandering magnetic strip with spatially modulated material parameters

    Science.gov (United States)

    Zhang, Z.; Tanaka, T.; Matsuyama, K.

    2017-05-01

    Feasibility of two-dimensional propagation of the domain wall (DW) was investigated by micromagnetic simulations. Successful bit-by-bit propagation of the DW was demonstrated in a designed meandering magnetic strip with periodic material parameter modulation, used as DW pinning sites (PSs). The DW was successively shifted along the straight part and around the corner with a spin polarized current pulses with 1 ns-width, 3 ns-interval and same amplitude. A practical current amplitude margin (30 % of mid value) was achieved by analyzing the energy landscape around the meandering corner and optimizing the location of the PSs, which energy barrier height assures a thermal stability criterion (>60 kBT).

  16. Effect of inactive yeast cell wall on growth performance, survival rate and immune parameters in Pacific White Shrimp (Litopenaeus vannamei

    Directory of Open Access Journals (Sweden)

    Rutchanee Chotikachinda

    2008-10-01

    Full Text Available Effects of dietary inactive yeast cell wall on growth performance, survival rate, and immune parameters in pacific white shrimp (Litopenaeus vannamei was investigated. Three dosages of inactive yeast cell wall (0, 1, and 2 g kg-1 were tested in three replicate groups of juvenile shrimps with an average initial weight of 7.15±0.05 g for four weeks. There was no significant difference in final weight, survival rate, specific growth rate, feed conversion ratio, feed intake, protein efficiency ratio, and apparent net protein utilization of each treatments. However, different levels of inactive yeast cell wall showed an effect on certain immune parameters (p<0.05. Total hemocyte counts, granular hemocyte count, and bacterial clearance were better in shrimp fed diets supplemented with 1 and 2 g kg-1 inactive yeast cell wall as compared with thecontrol group.

  17. wall

    Directory of Open Access Journals (Sweden)

    Irshad Kashif

    2016-01-01

    Full Text Available Maintaining indoor climatic conditions of buildings compatible with the occupant comfort by consuming minimum energy, especially in a tropical climate becomes a challenging problem for researchers. This paper aims to investigate this problem by evaluating the effect of different kind of Photovoltaic Trombe wall system (PV-TW on thermal comfort, energy consumption and CO2 emission. A detailed simulation model of a single room building integrated with PV-TW was modelled using TRNSYS software. Results show that 14-35% PMV index and 26-38% PPD index reduces as system shifted from SPV-TW to DGPV-TW as compared to normal buildings. Thermal comfort indexes (PMV and PPD lie in the recommended range of ASHARE for both DPV-TW and DGPV-TW except for the few months when RH%, solar radiation intensity and ambient temperature were high. Moreover PVTW system significantly reduces energy consumption and CO2 emission of the building and also 2-4.8 °C of temperature differences between indoor and outdoor climate of building was examined.

  18. 0-6716 : design parameters and methodology for mechanically stabilized earth (MSE) walls.

    Science.gov (United States)

    2013-08-01

    Since their appearance in the 1970s, mechanically : stabilized earth (MSE) walls have become a majority : among all types of retaining walls due to their economics : and satisfactory performance. The Texas Department of : Transportation (TxDOT) has p...

  19. Electric probe diagnostics for measuring SOL parameters, wall and divertor fluxes in KSTAR

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Heung-Su, E-mail: kimhs@nfri.re.kr [National Fusion Research Institute, Daejeon (Korea, Republic of); Bak, Jun-Gyo [National Fusion Research Institute, Daejeon (Korea, Republic of); Bae, Min-Keun; Chung, Kyu-Sun [Hanyang University, Seoul (Korea, Republic of); Hong, Suk-Ho [National Fusion Research Institute, Daejeon (Korea, Republic of)

    2016-11-01

    Highlights: • Some components in EPDs were improved to investigate characteristics of the SOL plasmas and to measure wall and divertor fluxes in the KSTAR tokamak plasmas. From the upgrades in the EPDs, the measured error of the elapsed distance for the evaluation of the SOL profiles can be reduced up to 1%. • In the SOL parameter measurement during IWL plasma, the e-folding lengths in the main SOL region lTe and lne were evaluated as 3.5 cm and 2.1 cm, respectively. • From flux measurement at the far SOL during a diverted ELMy H-mode, peaked heat flux toward to outboard wall during ELMs might be less than 1% of the peaked divertor heat flux. • The movement of an OSP during a diverted H-mode can be detected from the divertor probe measurement, and the peaked heat flux near the OSP was estimated as few MW m-2. - Abstract: Some components in electric probe diagnostics (EPDs) are improved in order to investigate characteristics of edge plasmas in the upstream scrape-off-layer (SOL) region and to measure wall and divertor fluxes during L-mode and H-mode plasma discharges in the Korea Superconducting Tokamak Advanced Research (KSTAR). From the upgrades in the EPDs, the measured error of the elapsed distance for the evaluation of the SOL profiles can be reduced up to 1% and the ion saturation current of up to 1.0 A near an outer strike point (OSP) can be measured at the divertor region. In the SOL profile measurements during L-mode and inner wall limited plasma (B{sub T} = 2.0 T, I{sub p} = 0.4 MA), the e-folding lengths in the main SOL region λ{sub Te} and λ{sub ne} are evaluated as 3.5 cm and 2.1 cm, respectively. From particle flux measurement at the far SOL region during a diverted ELMy H-mode discharge (B{sub T} = 1.8 T, I{sub p} = 0.65 MA), peaked heat flux toward to outboard wall during ELM bursts is estimated up to ∼20 k Wm{sup −2}, which may be less than 1% of the peaked divertor heat flux expected for the neutral beam (NB) heating power P{sub NB

  20. Die eerste siklus. Etienne Leroux. Kaapstad: Human & Rous- seau ...

    African Journals Online (AJOL)

    waarop dit die stryd teen die waardes en prak- tyke van die kapitalisme aanspreek deur die karakter van die anargis Juliana Doepels, wat lyk na 'n voorganger van die Occupy Wall. Street-protesteerders. Die roman se slottoneel. (onder andere beïnvloed deur die James Dean- film Rebel Without a Cause), waarin die mugu.

  1. Optimizing sonication parameters for dispersion of single-walled carbon nanotubes

    Energy Technology Data Exchange (ETDEWEB)

    Yu, Haibo [Fraunhofer Institute for Electronic Nano Systems (Fraunhofer ENAS), 09126 Chemnitz (Germany); Graduate University of the Chinese Academy of Sciences, Beijing (China); State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, 110016 Shenyang (China); Hermann, Sascha, E-mail: sascha.hermann@zfm.tu-chemnitz.de [Center for Microtechnologies (ZfM), Chemnitz University of Technology, 09126 Chemnitz (Germany); Schulz, Stefan E.; Gessner, Thomas [Fraunhofer Institute for Electronic Nano Systems (Fraunhofer ENAS), 09126 Chemnitz (Germany); Center for Microtechnologies (ZfM), Chemnitz University of Technology, 09126 Chemnitz (Germany); Dong, Zaili [State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, 110016 Shenyang (China); Li, Wen J., E-mail: wenjungli@gmail.com [State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, 110016 Shenyang (China); Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong SAR (China)

    2012-10-26

    Graphical abstract: We study the dispersing behavior of SWCNTs based on the surfactant and the optimization of sonication parameters including the sonication power and running time. Highlights: Black-Right-Pointing-Pointer We study the optimization of sonication for the surfactant-based dispersion of SWCNTs. Black-Right-Pointing-Pointer The absorption spectrum of SWCNT solution strongly depend on the sonication conditions. Black-Right-Pointing-Pointer The sonication process has an important influence on the average length and diameters of SWCNTs in solution. Black-Right-Pointing-Pointer Centrifugation mainly contributes to the decrease of nonresonant absorption background. Black-Right-Pointing-Pointer Under the same sonication parameters, the large-diameter tip performs dispersion of SWCNTs better than the small-diameter tip. -- Abstract: Non-covalent functionalization based on surfactants has become one of the most common methods for dispersing of single-walled carbon nanotubes (SWCNTs). Previously, efforts have mainly been focused on experimenting with different surfactant systems, varying their concentrations and solvents. However sonication plays a very important role during the surfactant-based dispersion process for SWCNTs. The sonication treatment enables the surfactant molecules to adsorb onto the surface of SWCNTs by overcoming the interactions induced by the hydrophobic, electrostatic and van der Waals forces. This work describes a systematic study of the influence of the sonication power and time on the dispersion of SWCNTs. UV-vis-NIR absorption spectra is used to analyze and to evaluate the dispersion of SWCNTs in an aqueous solution of 1 w/v% sodium deoxycholate (DOC) showing that the resonant and nonresonant background absorption strongly depends on the sonication conditions. Furthermore, the diameter and length of SWCNTs under different sonication parameters are investigated using atomic force microscopy (AFM).

  2. Tritium Plasma Experiment (TPE) - parameters and potentials for fusion plasma-wall interaction studies

    Energy Technology Data Exchange (ETDEWEB)

    Masashi Shimada; Robert D. Kolasinski; J. Phillip Sharpe; Rion A. Causey

    2011-08-01

    The Tritium plasma experiment (TPE) is a unique facility devoted to experiments on the behavior of deuterium/tritium in toxic (e.g. beryllium) and radioactive materials for fusion plasma-wall interaction (PWI) studies. A Langmuir probe was added to the system to characterize the plasma conditions in TPE. With this new diagnostic, we found the achievable electron temperature ranged from 5.0 to 10.0 eV, the electron density varied from 5.0 x 10{sup 16} to 2.5 x 10{sup 18} m{sup -3}, and the ion flux density varied between 5.0 x 10{sup 20} to 2.5 x 10{sup 22} m{sup -2}s{sup -1} along the centerline of the plasma. A comparison of these plasma parameters with the conditions expected for the plasma facing components (PFCs) in ITER shows that TPE is capable of achieving most (approximately 800 m{sup 2} of 850 m{sup 2} total PFCs area) of the expected ion flux density and electron density conditions.

  3. Predicting Stress vs. Strain Behaviors of Thin-Walled High Pressure Die Cast Magnesium Alloy with Actual Pore Distribution

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Kyoo Sil; Barker, Erin; Cheng, Guang; Sun, Xin; Forsmark, Joy; Li, Mei

    2016-01-06

    In this paper, a three-dimensional (3D) microstructure-based finite element modeling method (i.e., extrinsic modeling method) is developed, which can be used in examining the effects of porosity on the ductility/fracture of Mg castings. For this purpose, AM60 Mg tensile samples were generated under high-pressure die-casting in a specially-designed mold. Before the tensile test, the samples were CT-scanned to obtain the pore distributions within the samples. 3D microstructure-based finite element models were then developed based on the obtained actual pore distributions of the gauge area. The input properties for the matrix material were determined by fitting the simulation result to the experimental result of a selected sample, and then used for all the other samples’ simulation. The results show that the ductility and fracture locations predicted from simulations agree well with the experimental results. This indicates that the developed 3D extrinsic modeling method may be used to examine the influence of various aspects of pore sizes/distributions as well as intrinsic properties (i.e., matrix properties) on the ductility/fracture of Mg castings.

  4. Multi Electrode Geoelectric on the Borehole Wall. Determination of Groundwater Velocity and Dispersion Parameters

    Science.gov (United States)

    Kessels, W.; Thorenz, C.; Rifai, H.

    2002-05-01

    A single well technique to determine groundwater flow and transport parameters is presented. Multi-electrode arrays are placed on a borehole wall by an inflatable packer or are installed behind the plastic casing. For measurements, a salt tracer is injected between the electrodes. This salt tracer cloud is afterwards moving in the natural groundwater flow field. The observation of this movement by geoelectric measurements is the basis for the determination of groundwater velocity and the dispersion parameters. The geoelectric observations are performed with n borehole electrodes and one earth connection. Thus, either n independent two point measurements or n*(n-1)/2 pole-to-pole measurements can be performed. The whole procedure consists of three phases: 1. Measurement of the basic conductivity without tracer. 2. Measurement during the injection. 3. Measurement after injection To test the method, measurements in a lab aquifer filled with sand are carried out. The results are discussed and the limitations of the method are shown. Here, the interpretation is restricted on two point geoelectric measurements and the transport equation for NaCl-tracered water. Due to the density contrast, the tracer shows a vertical movement which is not related to the natural velocity field. Numerical calculations with the finite-element-method simulator ROCKFLOW (Kolditz et al., 1999) reproduced this behaviour. The currently used interpretation code is based on an analytic solution of the transport equation. The parameters velocity and dispersion length are calculated by inversion. In the two scientific drillings CAT-LUD1 and CAT-LUD1A in the northern part of Germany multi-electrode installations behind the casing are tested in situ. A multi-electrode packer system is designed and build. References: Kessels, W., Zoth, G.(1997): Doppelmantel - Packers mit geoelektrischer Meßtechnik zur Bestimmung der Abstandsgeschwindigkeit des Grundwassers, Patentanmeldung Az:19855048.0 NLf

  5. Oor die onvoorwaardelike lognormaalverdeling

    Directory of Open Access Journals (Sweden)

    J. J. J. Roux

    1989-03-01

    Full Text Available Die onvoorwaardelike lognormaalverdeling wat ryk aan parameters is, word voorgestel en na ’n meervariate verdeling uitgebrei. Teoretiese eienskappe en ’n toepassing van die onvoorwaardelike lognormaalmodel word gegee.

  6. Parameter Sensitivity Analysis on Deformation of Composite Soil-Nailed Wall Using Artificial Neural Networks and Orthogonal Experiment

    Directory of Open Access Journals (Sweden)

    Jianbin Hao

    2014-01-01

    Full Text Available Based on the back-propagation algorithm of artificial neural networks (ANNs, this paper establishes an intelligent model, which is used to predict the maximum lateral displacement of composite soil-nailed wall. Some parameters, such as soil cohesive strength, soil friction angle, prestress of anchor cable, soil-nail spacing, soil-nail diameter, soil-nail length, and other factors, are considered in the model. Combined with the in situ test data of composite soil-nail wall reinforcement engineering, the network is trained and the errors are analyzed. Thus it is demonstrated that the method is applicable and feasible in predicting lateral displacement of excavation retained by composite soil-nailed wall. Extended calculations are conducted by using the well-trained intelligent forecast model. Through application of orthogonal table test theory, 25 sets of tests are designed to analyze the sensitivity of factors affecting the maximum lateral displacement of composite soil-nailing wall. The results show that the sensitivity of factors affecting the maximum lateral displacement of composite soil nailing wall, in a descending order, are prestress of anchor cable, soil friction angle, soil cohesion strength, soil-nail spacing, soil-nail length, and soil-nail diameter. The results can provide important reference for the same reinforcement engineering.

  7. Assessment of wall elasticity variations on intraluminal haemodynamics in descending aortic dissections using a lumped-parameter model.

    Science.gov (United States)

    Rudenick, Paula A; Bijnens, Bart H; Segers, Patrick; García-Dorado, David; Evangelista, Arturo

    2015-01-01

    Descending aortic dissection (DAD) is associated with high morbidity and mortality rates. Aortic wall stiffness is a variable often altered in DAD patients and potentially involved in long-term outcome. However, its relevance is still mostly unknown. To gain more detailed knowledge of how wall elasticity (compliance) might influence intraluminal haemodynamics in DAD, a lumped-parameter model was developed based on experimental data from a pulsatile hydraulic circuit and validated for 8 clinical scenarios. Next, the variations of intraluminal pressures and flows were assessed as a function of wall elasticity. In comparison with the most rigid-wall case, an increase in elasticity to physiological values was associated with a decrease in systolic and increase in diastolic pressures of up to 33% and 63% respectively, with a subsequent decrease in the pressure wave amplitude of up to 86%. Moreover, it was related to an increase in multidirectional intraluminal flows and transition of behaviour as 2 parallel vessels towards a vessel with a side-chamber. The model supports the extremely important role of wall elasticity as determinant of intraluminal pressures and flow patterns for DAD, and thus, the relevance of considering it during clinical assessment and computational modelling of the disease.

  8. Transdermales Testosterongel verbessert die Parameter Sexualfunktion, Stimmung, Muskelkraft und Körperzusammensetzung bei hypogonadalen Männern

    Directory of Open Access Journals (Sweden)

    Wang C

    2003-01-01

    Full Text Available Eine Testosterontherapie bei hypogonadalen Männern sollte die klinisch manifesten Symptome eines Testosteronmangels im Sinne der Verbesserung der Sexualfunktion, der Vermehrung der Muskelmasse und -kraft sowie der Verringerung des Körperfettanteils korrigieren, ohne gleichzeitig nennenswerte Nebenwirkungen hervorzurufen. Wir haben bereits gezeigt, daß die Verabreichung eines neuen transdermalen Testosterongels an Männer mit Hypogonadismus zu dosisabhängigen Erhöhungen des Serumtestosteronspiegels in den Normalbereich erwachsener Männer führt. Wir berichten nun über die Auswirkungen einer 6-monatigen Behandlung mit diesem 1 %igen Testosterongel (50 bzw. 100 mg Testosteron pro Tag, enthalten in 5 bzw. 10 g Gel im Vergleich zu einem Penetrationsvermittler enthaltenden Testosteronpflaster (5 mg/Tag auf bestimmte Wirksamkeitsparameter bei 227 Männern mit Hypogonadismus. In den mit Testosterongel behandelten Gruppen wurde die Dosis am Studientag 90 auf 75 mg/Tag (enthalten in 7,5 g Gel erhöht oder gesenkt, wenn die Serumtestosteronspiegel über oder unter dem Normalbereich für erwachsene Männer lagen. In der Gruppe mit Testosteronpflaster wurde keine Dosisanpassung vorgenommen. Die Sexualfunktion und Stimmungsveränderungen wurden anhand eines Fragebogens, die Körperzusammensetzung anhand der DEXA-Methode und die Muskelkraft mit einer speziellen Technik("one repetitive maximum technique" durch Pressen der Beine und Arme ermittelt. Sexualfunktion und Stimmung verbesserten sich bereits am Tag 30 der Behandlung maximal, ohne Unterschied zwischen den Gruppen, und zeigten bei Fortsetzung der Therapie keine weitere Besserung. Die mittlere Muskelkraft bei der Beinpreßübung erhöhte sich in allen Gruppen nach 90 Behandlungstagen um 11 bis 13 kg und verbesserte sich anschließend bis zum Ende der Behandlung am Tag 180 nicht weiter. Zu mäßigen Steigerungen der Kraftentwicklung kam es auch an der Schulter- und Armmuskulatur. Nach 90 Tagen

  9. Die binding van die konfessie

    Directory of Open Access Journals (Sweden)

    P. J. Coetzee

    1970-06-01

    Full Text Available Ons moet waak teen twee uiterstes. Aan die een kant het die dogma as onversoenlike vyand die dogmatisme en aan die ander kant die antidogmatisme — dit hou enersyds die gevaar in van verabsolutering (oorskatting, en ander- syds die gevaar van relativisme (onderskatting.

  10. Die instelling van die doop

    Directory of Open Access Journals (Sweden)

    J. L. Venter

    1989-06-01

    Full Text Available Die eerste plek in die evangeliebeskrywings waar daar van die doop as ’n opdrag van Jesus Christus gepraat word en waar die betekenis die duidelikste uitkristalliseer, staan in Matteus 28 : 16 - 20. Heilshistories gesien, is dit die begin van kerklike inlywing van die wat gehoor het hoedat Jesus sy koninkryk proklameer, die evangelie aanvaar en tot bekering kom. Vir die doel van hierdie artikel word hierdie gedeelte ondersoek om te sien hoe die instelling geskied het, wat die plek en betekenis van die Christelike doop is.

  11. Evaluation of wall boundary condition parameters for gas-solids fluidized bed simulations

    Energy Technology Data Exchange (ETDEWEB)

    Li, Tingwen [URS Corporation; Morgantown, WV (United States); National Energy Technology Lab. (NETL), Morgantown, WV (United States); Benyahia, Sofiane [National Energy Technology Lab. (NETL), Morgantown, WV (United States)

    2013-10-01

    Wall boundary conditions for the solids phase have significant effects on numerical predictions of various gas-solids fluidized beds. Several models for the granular flow wall boundary condition are available in the open literature for numerical modeling of gas-solids flow. In this study, a model for specularity coefficient used in Johnson and Jackson boundary conditions by Li and Benyahia (AIChE Journal, 2012, 58, 2058-2068) is implemented in the open-source CFD code-MFIX. The variable specularity coefficient model provides a physical way to calculate the specularity coefficient needed by the partial-slip boundary conditions for the solids phase. Through a series of 2-D numerical simulations of bubbling fluidized bed and circulating fluidized bed riser, the model predicts qualitatively consistent trends to the previous studies. Furthermore, a quantitative comparison is conducted between numerical results of variable and constant specularity coefficients to investigate the effect of spatial and temporal variations in specularity coefficient.

  12. Die eenheid van die universiteit

    Directory of Open Access Journals (Sweden)

    W. N. Coetzee

    1969-03-01

    Full Text Available Dit lyk na ’n teenstrydigheid otn te besin oor die eenheid van ’n universiteit. Die naam „universiteit” is tog afgelei van die Latynse woord „universitas”, wat in die amptelike stukke van die meeste Europese lande vandag nog gebruik word. Hierdie woord beteken „die geheel” en dit veronderstel natuurlik dadelik eenheid.

  13. The Influence of Pressure Die Casting Parameters on the Mechanical Properties of AlSi11/10 Vol.% SiC Composite

    Directory of Open Access Journals (Sweden)

    Konopka Z.

    2014-03-01

    Full Text Available The paper presents the method of preparing a composite slurry composed of AlSi11 alloy matrix and 10 vol.% of SiC particles, as well as the method of its high-pressure die casting and the measurement results concerning the tensile strength, the yield point, the elongation and hardness of the obtained composite. Composite castings were produced at various values of the piston velocity in the second stage of injection, diverse intensification pressure values, and various injection gate width values. There were found the regression equations describing the change of mechanical properties of the examined composite as a function of pressure die casting process parameters. The conclusion gives the analysis and the interpretation of the obtained results.

  14. Die kerkregtelike posisie van die ouderling en diaken in die ...

    African Journals Online (AJOL)

    ) en die Diakonale Dienskomitees (DDK). Die ADR en die RDR moet slegs as komplimentêr gesien word ten opsigte van die gemeentelike barmhartigheid, omdat die swaartepunt van die barmhartigheid steeds in die gemeente, waar die kerk ...

  15. Nonlinear Optical Measurements of the Artery Wall: Parameters Related to the Progression of Atherosclerosis

    Science.gov (United States)

    Sowa, Michael G.; Mostaco-Guidolin, Leila B.; Smith, Michael S. D.; Kohlenberg, Elica K.; Ridsdale, Andrew; Stolow, Albert; Ko, Alex C. T.

    2009-01-01

    Nonlinear optical (NLO) microscopy is used to follow key structural and biochemical changes associated with the progression of atherosclerosis. Arteries from WHHL-MI rabbits are examined using a 3 channel NLO microscope that can simultaneously monitor the coherent anti-stokes Raman scattered light (CARS), the two-photon excited fluorescence (TPEF) and the second harmonic generation (SHG) from a sample. Distinct differences in the nonlinear optical signals are observed that correlate with the age of the vessel and the presence of atherosclerotic plaque. These differences are attributed to the changing extracellular matrix and the increased lipid deposition associated with plaque development. The capability of NLO to perform 3D sectioning in thick highly scattering vessels in order to visualize structural details of the artery wall and highlight vessel pathology is demonstrated. These features make NLO a potentially valuable tool to help understand the progression of atherosclerosis.

  16. STUDY OF SINGLE WALLED CARBON NANOTUBE REINFORCED POLYMER COMPOSITES BY HANSEN SOLUBILITY PARAMETERS

    DEFF Research Database (Denmark)

    Ma, Jing

    major challenges which limit the use of SWNTs for reinforced polymer composites. The main objectives of this PhD work are to design, fabricate SWNTs/polymer composites and characterize the mechanical properties of the composite materials. This study uses the Hansen solubility parameters (HSP) to predict...... transfer from polymer matrix to nanotube fillers is evaluated by Raman spectroscopy. The results are compared with the observation of the dispersion and Hansen Solubility Parameters. It is found that a good strain transfer can be obtained when the SWNTs are well dispersed and also when there is a good...

  17. Design of welding parameters for laser welding of thin-walled stainless steel tubes using numerical simulation

    Science.gov (United States)

    Nagy, M.; Behúlová, M.

    2017-11-01

    Nowadays, the laser technology is used in a wide spectrum of applications, especially in engineering, electronics, medicine, automotive, aeronautic or military industries. In the field of mechanical engineering, the laser technology reaches the biggest increase in the automotive industry, mainly due to the introduction of automation utilizing 5-axial movements. Modelling and numerical simulation of laser welding processes has been exploited with many advantages for the investigation of physical principles and complex phenomena connected with this joining technology. The paper is focused on the application of numerical simulation to the design of welding parameters for the circumferential laser welding of thin-walled exhaust pipes from theAISI 304 steel for automotive industry. Using the developed and experimentally verified simulation model for laser welding of tubes, the influence of welding parameters including the laser velocity from 30 mm.s‑1 to 60 mm.s‑1 and the laser power from 500 W to 1200 W on the temperature fields and dimensions of fusion zone was investigated using the program code ANSYS. Based on obtained results, the welding schedule for the laser beam welding of thin-walled tubes from the AISI 304 steel was suggested.

  18. Developing LBM Process Parameters for Ti-6Al-4V Thin Wall Structures and Determining the Corresponding Mechanical Characteristics

    Science.gov (United States)

    Ahuja, Bhrigu; Schaub, Adam; Karg, Michael; Lechner, Michael; Merklein, Marion; Schmidt, Michael

    The Laser Beam Melting (LBM) process technology within the family of Additive Manufacturing technology is characterized by its ability to fabricate fully dense 3D structures directly from micro-sized metal powder. With the current state of the art, Ti-6Al-4V has been processed using LBM machine systems constituting a laser with a beam diameter of about 100 μm. In order to fabricate structures with smaller wall thicknesses, processing of Ti-6Al-4V is attempted on the LBM machine system, Realizer SLM 50 consisting of a laser with a beam diameter 10 μm. The proposed paper presents the development of process parameters for fabricating fully dense Ti-6Al-4V 3D structures using the LBM machine system, Realizer SLM 50. Further experiments are carried out to determine the wall thickness and mechanical properties achievable using the selected process parameters. Analysis and scientific arguments are presented to explain the influence of building direction and heat treatment on mechanical properties.

  19. Modeling and experimental investigation of LM26 pressure die cast process parameters using multi objective genetic algorithm (MOGA

    Directory of Open Access Journals (Sweden)

    N. Zeelanbasha

    2017-01-01

    Full Text Available This present investigation deals with pressure die casting process to produce an automotive valve closer component with better mechanical properties such as micro-hardness(HV, surface roughness (μm and porosity (% on LM26 by varying intensification pressure (α Kgf/cm2, shot velocity (β m/s and pouring temperature (γ °C. Using response surface methodology (RSM, the optimal parametric combination is found to be α (186,68 Kgf/cm2, β (0,599 m/s and γ (662,93 °C for multi responses (121,18 HV, (0,93 μm and 0,017 % can be achieved corresponding to highest desirability of 0,73. The optimized results were obtained by the Pareto-optimal solutions using multi objective genetic algorithm (MOGA provides flexibility to select the best setting depending on suitable applications.

  20. Die topkwark

    Directory of Open Access Journals (Sweden)

    R. Tegen

    1998-07-01

    Full Text Available ’n Oorsig van die belangrikheid van die onlangs ontdekte topkwark by Fermilab in Chicago word gegee. Daar word aangetnon dat die topkwark belangrik is in fisika van die Oerknal, oftewel "Big Bang", en in die Standaard Model van Elementêredeeltjie-fisika. Toepaslike literatuur vir verdere studie kan van die lys van verwysings in hierdie kort, nietegniese artikel, nagegaan word.

  1. POWER PARAMETERS OF THE PROCESS OF END FORMING OF THICK WALLED TUBES

    Directory of Open Access Journals (Sweden)

    V. A. Tamila

    2016-01-01

    Full Text Available Analysis of forces acting on the rolls in the radial direction made by the analytical method and with use of computer modeling techniques is made. Application of FEM has allowed to calculate distribution of power parameters of the technological process during time. The deviation of the experimental data on the results of analytical calculation is within 3%.

  2. Study of myocardial regional wall motion parameter's accuracy by software perfusion phantom.

    Science.gov (United States)

    Fidler, V; Fettich, J; Prepadnik, M

    1992-06-01

    Gated perfusion myocardial scintigraphy permits simultaneous evaluation of perfusion as well as regional contractile function of the left ventricle. Fourier analysis of regional myocardial spatial movement with respect to the myocardial geometric centre gives circular amplitude and phase profiles of ventricular contraction, in addition to regional maximum activity that represents an index of perfusion. To introduce such combined perfusion-contraction analysis the accuracy of the indices mentioned above should be evaluated for different doses of radioactivity typically administered to a patient. A mathematical software phantom, consisting of a half circularly profiled ring activity embedded in uniform background activity and noise generated by a Poisson-shaped random number generator, was constructed and used for this purpose. A 64 x 64 matrix and sequence of 16 frames per study was used. The maximum number of counts per pixel ranged from 10 to 100, simulating low count thallium and high count rate Tc-MIBI-gated studies. The relative standard error analysis (R.S.E.) with a 95.5% confidence level for a thallium type of 10 counts per pixel study exceeded 11%, while it reached acceptable values below 3% for studies with 60 and more counts per pixel. These results indicate that high count rate gated technetium-MIBI myocardial perfusion studies could also be used for reliable left ventricular regional wall motion evaluation.

  3. DIE KLOOF TUSSEN ROME EN DIE PROTESTANTISME Die ...

    African Journals Online (AJOL)

    Test

    ryke leër van die belyders noem U die tempel van die heiligste Drie vuldigheid. Die hele hemelse hof eer U as Koningin. U is die Konin gin van die engele, die poort van die paradys. Leer tot die glorie van die hemel, troon van God, ark van versoening en genade. Kanaal van genade, Bruid en Moeder van die ewige Koning.

  4. Effect of processing parameter and filler content on tensile properties of multi-walled carbon nanotubes reinforced polylactic acid nanocomposite

    Science.gov (United States)

    Ali, Adilah Mat; Ahmad, Sahrim Hj.

    2013-05-01

    Polymer nanocomposite of multi-walled carbon nanotubes (MWCNT) nanoparticles incorporated with polylactic acid (PLA) and liquid natural rubber (LNR) as compatibilizer were prepared via melt blending method using the Haake Rheomix internal mixer. In order to obtain the optimal processing parameter, the nanocomposite with 89 wt % of PLA was blended with 10 wt % of LNR and 1 wt % of MWCNTs were mixed with various mixing parameter condition; mixing temperature, mixing speed and mixing time. The optimum processing parameter of the composites was obtained at temperature of 190°C, rotation speed of 90 rpm and mixing time of 14 min. Next, the effect of MWCNTs loading on the tensile properties of nanocomposites was investigated. The nanocomposites were melt blended using the optimal processing parameter with MWCNTs loading of 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5 and 4 wt %. The result showed that the sample with 3.5 wt % of MWCNTs gave higher tensile strength and Young's modulus. The SEM micrographs confirmed the effect of good dispersion of MWCNTs and their interfacial bonding in PLA nanocomposites. However, the elongation at break decreased with increasing the percentage of MWCNTs.

  5. Importance of material parameters and strain energy function on the wall stresses in the left ventricle.

    Science.gov (United States)

    Behdadfar, Sareh; Navarro, Laurent; Sundnes, Joakim; Maleckar, Molly M; Avril, Stéphane

    2017-08-01

    Patient-specific estimates of the stress distribution in the left ventricles (LV) may have important applications for therapy planning, but computing the stress generally requires knowledge of the material behaviour. The passive stress-strain relation of myocardial tissue has been characterized by a number of models, but material parameters (MPs) remain difficult to estimate. The aim of this study is to implement a zero-pressure algorithm to reconstruct numerically the stress distribution in the LV without precise knowledge of MPs. We investigate the sensitivity of the stress distribution to variations in the different sets of constitutive parameters. We show that the sensitivity of the LV stresses to MPs can be marginal for an isotropic constitutive model. However, when using a transversely isotropic exponential strain energy function, the LV stresses become sensitive to MPs, especially to the linear elastic coefficient before the exponential function. This indicates that in-vivo identification efforts should focus mostly on this MP for the development of patient-specific finite-element analysis.

  6. die rol van die unieverdedigingsmag in die onderdrukking van die ...

    African Journals Online (AJOL)

    DIE ROL VAN DIE UNIEVERDEDIGINGSMAG. IN DIE ONDERDRUKKING VAN DIE. NYWERHEIDSONLUSTE. VAN JANUARIE. 1914. Maj C.J. Jacobs. During the Railways and Mineworkers strike which commenced on the 18th of January 1914, the. Union Defence Force, enlarged by the Active Citizen Force and assisted ...

  7. Memorandum op die beswaarskrif oor die diakenamp

    Directory of Open Access Journals (Sweden)

    L. Floor

    1976-06-01

    Full Text Available Die probleem in die beswaarskrif voor die Sinode 1973 spits hom toe op die vraag: wat is die objek van die diakonale diens? Is dit die hele gemeente of alleen ’n gedeelte van die gemeente nl. die armes? In verband hiermee moet ook gevra word: welke spesifieke opdrag is inherent aan die diakenamp?

  8. Effect of Steel Framing for Securing Drywall Panels on Thermal and Humidity Parameters of the Outer Walls

    Directory of Open Access Journals (Sweden)

    Major Maciej

    2017-12-01

    Full Text Available The paper analyses the effect of steel framing used to secure drywall panels on thermal and humidity properties of outer walls. In the practice of building a light structure, the most popular components are steel and wood studs. They are used to obtain framing for building a wall (an outer wall in this study. Analysis presented in this study concerned the corner of the outer wall build using the technology of light steel framing. Computer simulation was used to perform thermal and humidity analysis for the joint of the outer wall.

  9. Effect of Steel Framing for Securing Drywall Panels on Thermal and Humidity Parameters of the Outer Walls

    Science.gov (United States)

    Major, Maciej; Kosiń, Mariusz

    2017-12-01

    The paper analyses the effect of steel framing used to secure drywall panels on thermal and humidity properties of outer walls. In the practice of building a light structure, the most popular components are steel and wood studs. They are used to obtain framing for building a wall (an outer wall in this study). Analysis presented in this study concerned the corner of the outer wall build using the technology of light steel framing. Computer simulation was used to perform thermal and humidity analysis for the joint of the outer wall.

  10. An alternative design method for the double-layer combined die using autofrettage theory

    Directory of Open Access Journals (Sweden)

    C. Hu

    2017-08-01

    Full Text Available The double-layer combined die is used for its longer life in forging. Autofrettage is a well-known elastic–plastic technology that increases the durability of thick-walled cylinders. This study explores an alternative design method of the double-layer combined die using autofrettage theory. An analytical solution for the autofrettage process of the double-layer combined die is obtained based on Lamé's equation. The relationship between the autofrettage pressure and the yield radius of the die insert is obtained, and expressions of residual stresses and displacements, which are directly related to geometric parameters, material properties and internal pressure, are derived. The finite-element simulation of a specific case is performed, and good agreement between theoretical calculations and simulation results is found. Furthermore, the effects of important parameters, including the ratio of the plastic area and yield strength of the die insert and the outer diameters of the die insert and stress ring, on the autofrettage effect are investigated. Compared with the conventional combined die, the autofrettaged die can bear larger working pressure, as expected. The use of the autofrettaged die can reduce the amount of expensive material required for the die insert and the working space of the die set, which would benefit the practical forging process.

  11. Die teologie in gesprek met die ekonomie

    African Journals Online (AJOL)

    diktaat van die regte rede' is en John Locke (1632-1704), wie se rasionalisering van die samelewing die beste daarin slaag om uitdrukking te gee aan die wese van die opkomende Britse liberalisme van die sewentiende eeu. 2^ 'n Samelewing waarin die ekonomie die bepalende posisie inneem. Die samelewing wat ...

  12. die verwerkliking van die geloof in die kerklike kategese

    African Journals Online (AJOL)

    verbondskind 'n blye en aktiewe instemming met en aanvaarding van die beloftes en die eise van die genadeverbond. Verbondskinders moet daartoe kom om dit wat objektief in die verbond belowe is, persoonlik deelagtig te word; dit is die daad van heilstoe-eiening. Die verbond is die verseëling van die belofte van God.

  13. Effect of Steel Framing for Securing Drywall Panels on Thermal and Humidity Parameters of the Outer Walls

    OpenAIRE

    Major Maciej; Kosiń Mariusz

    2017-01-01

    The paper analyses the effect of steel framing used to secure drywall panels on thermal and humidity properties of outer walls. In the practice of building a light structure, the most popular components are steel and wood studs. They are used to obtain framing for building a wall (an outer wall in this study). Analysis presented in this study concerned the corner of the outer wall build using the technology of light steel framing. Computer simulation was used to perform thermal and humidity a...

  14. Die posisie van die Helper in die sending

    Directory of Open Access Journals (Sweden)

    I. J. van der Walt

    1972-06-01

    Full Text Available Gedurende die aanvangsjare van die sending het die helper ’n onmisbare funksie vervul. Hulle het die onherbergsame binnelande geken, waardevolle kontakpunte vir die sendelinge geopen en hulle mense geestelik help voorlig en voorberei.

  15. Die posisie van die Helper in die sending

    Directory of Open Access Journals (Sweden)

    I. J. van der Walt

    1972-05-01

    Full Text Available Gedurende die aanvangsjare van die sending het die helper ’n onmisbare funksie vervul. Hulle het die onherbergsame binnelande geken, waardevolle kontakpunte vir die sendelinge geopen en hulle mense geestelik help voorlig en voorberei.

  16. Die Kumulantenmethode

    OpenAIRE

    Seeger, Steffen

    2003-01-01

    In dieser Arbeit wird eine neue Methode zur Reduktion der Boltzmann-Gleichung auf ein System partieller Differentialgleichungen diskutiert. Nach einer kurzen Einführung in die kinetische Theorie einer Mischung inerter Gase wird ein Überblick in die aus der Literatur bekannten Momentenmethoden gegeben. Der anschließend vorgestellten Kumulantenmethode liegt die Annahme zugrunde, daß durch Stoßprozesse in einem Gas Korrelationen höherer Ordnung schneller abgebaut we...

  17. DIE PERSOON VAN VREDE IN DIE SENDING

    African Journals Online (AJOL)

    6. KOMMUNIKASIE VAN DIE EVANGELIE EN. SENTRALE FIGURE IN DIE GEMEENSKAP. Die kommunikasie van die evangelie in gemeenskappe word dikwels bevorder of bemoeilik deur die persoon van die sendeling en die persone tot wie hy/sy hom rig. Dit is inderdaad so dat mense 'n belangrike rol kan speel in die ...

  18. Effects of estrogenic chemicals on fish: investigation of reproduction parameters on rainbow trout and zebrafish; Die Wirkung estrogen aktiver Umweltchemikalien auf Fische. Untersuchungen reproduktionsrelevanter Parameter bei Regenbogenforelle und Zebrabaerbling

    Energy Technology Data Exchange (ETDEWEB)

    Bieberstein, U.

    2001-07-01

    Fischpopulation zu untersuchen. Hierzu wurden immunhisto- und immuncytochemische Untersuchungen an Regenbogenforellen (Oncorhynchus mykiss) und In vivo-Langzeitversuche mit Zebrabaerblingen (Danio rerio) ueber den gesamten Lebenszyklus im Durchflusssystem durchgefuehrt. Mit Hilfe eines polyklonalen Antikoerpers gegen Regenbogenforellen-Vg gelang es, nach 17b-Estradiol-Injektion Vg in der Leber weiblicher und maennlicher Regenbogenforellen nachzuweisen. Durch die Immuncytochemie konnte der intrazellulaere Synthese- und Sekretionsweg von Vg ueber das rER und den Golgi-Apparat dargestellt werden. Am Beispiel des Zebrabaerblings war die endokrine Wirkung von Nonylphenol (NP), Octylphenol (OP) und Dehydroepiandrosteron (DHEA) auf Fische nachweisbar. Die Untersuchung ausgewaehlter entwicklungs-biologischer, reproduktionsbiologischer, anatomischer, histologischer und ultrastruktureller Parameter ermoeglichte eine Bewertung schadstoffbedingter Veraenderungen waehrend der Larval-, Juvenil- und Adultphase der Tiere. Die lebenslange Belastung der Zebrabaerblings-Populationen mit NP, OP und DHEA fuehrte grundsaetzlich zu einer deutlichen Verschiebung des Geschlechterverhaeltnisses in Richtung der weiblichen Fische. Nach Abschluss der Exposition der Zebrabaerblinge im Durchflusssystem waren, induziert durch NP, OP und DHEA, weitreichende konditionelle und strukturelle Veraenderungen der Reproduktionsorgane, des Skeletts und der Leber dokumentierbar. Es konnte nachgewiesen werden, dass toxische Wirkungen von NP, OP und DHEA bereits nach einwoechiger Belastung waehrend der Embryonal- und Larvalphase erkannt werden koennen, waehrend sich estrogene Wirkungen auf den Zebrabaerbling, erst nach Exposition ueber den gesamten Lebenszyklus zeigen.

  19. Statistical Approach to Optimize the Process Parameters of HAZ of Tool Steel EN X32CrMoV12-28 after Die-Sinking EDM with SF-Cu Electrode

    Directory of Open Access Journals (Sweden)

    L’uboslav Straka

    2017-01-01

    Full Text Available The paper describes the results of the experimental research of the heat affected zone (HAZ of an eroded surface after die-sinking electrical discharge machining (EDM. The research was carried out on chrome-molybdenum-vanadium alloyed tool steel EN X32CrMoV12-28 (W.-Nr. 1.2365 after die-sinking EDM with a SF-Cu electrode. The aim of the experimental measurements was to contribute to the database of knowledge that characterizes the significant impact of the main technological and process parameters on the eroded surface properties during die-sinking EDM. The quality of the eroded surface was assessed from the viewpoint of surface roughness, microhardness variation, and the total HAZ depth of the thin sub-surface layer adjacent to the eroded surface. On the basis of measurement results, mathematical models were established by statistical methods. These models can be applied for computer simulation and prediction of the resultant quality of the machined surface after die-sinking EDM. The results achieved by simulation were compared with the results of experimental measurements and high correlation indexes between the predicted and real values were achieved. Suggested mathematical models can be also applied for the determination of the optimal combination of significant technological parameters in order to minimize microhardness and total HAZ depth variations of tool steel EN X32CrMoV12-28 after die-sinking EDM with a SF-Cu electrode.

  20. Oor die Bybel in die Afrikaanse digkuns

    African Journals Online (AJOL)

    In 'Lotos-land' dryf hy die spot met die Kanaánitiese siening van Suid-Afrika, met die sogenaamde Land van Belofte, Suid-Afrika, met die verdoping van Suid-Afri- kaanse plekke met Bybelse name en die siening van die Kaapkolonie as Egipte, ensovoorts. Die (Suid-)Afrikaanse Kanaán is in hierdie gedig 'n Luilekkerland - ...

  1. Untersuchungen zur Eignung von Mangoschalen (Mangifera indica L.) in der Tierernährung und deren Einfluss auf die zootechnische Leistung sowie verdauungsphysiologische und mikrobiologische Parameter bei Absetzferkeln

    OpenAIRE

    Brucker, Lisa

    2016-01-01

    Im Rahmen dieser Studie wurde die Eignung von Mangoschalen in der Fütterung von Absetzferkeln anhand verschiedener Untersuchungen getestet. Zu Beginn erfolgte die Durchführung von Kurzzeitinkubationen von Sauenkot mit verschiedenen Kohlenhydraten. Nach 24-stündiger Inkubationsdauer unter anaeroben Bedingungen wurde das Fermentationsmuster anhand der gebildeten bakteriellen Metaboliten analysiert. Darüber hinaus wurde durch semikontinuierliche Langzeitinkubationen mit Caecuminhalt von Absetzfe...

  2. Die betekenis van die sesde gebod vir die mediese etiek

    African Journals Online (AJOL)

    Smedes vra die vraag of 'n mens dan wederregtelik mag doodmaak? Smedes meen dat wederregtelikheid nie die toets van hierdie gebod is nie. Vir Hitler was dit nie wederregtelik om die Jode dood te maak nie, wel vir 'n Duitse burger om Hitler dood te maak. Die bedoeling van die gebod vind hy eerder in die reg om voor ...

  3. die heidelbergse kategismus en die kategesemateriaal van die ned ...

    African Journals Online (AJOL)

    rede was vir die opdrag van die koning aan Zacharias Ursinus en Caspar. Oliveanus vir die skryf van 'n kategismus. Die doel van die kategismus was om nie net beter vir die jeug te sorg nie, maar om aan evangeliedienaars en skoolmeesters 'n vaste leidraad te gee sodat hulle nie willekeurig nuwe dinge leer wat met Gods ...

  4. Die Reformasie en Skrifinterpretasie: Die nuwe wat die Reformasie ...

    African Journals Online (AJOL)

    p1243322

    onbevangenheid sal ons, soos in die geval van baie ander stemme uit die verlede, nooit werklik klaar wees met die stem van die Reformasie nie, dit is wanneer ons die Reformasie nie in ons eie pakkie van vooropgestelde idees toevou en neutraliseer nie. Die Reformasie se stem sal aanhou gehoor word, en in aansluiting ...

  5. Die regsposisie van die gemolesteerde kind 1

    Directory of Open Access Journals (Sweden)

    P.J. Schabort

    1991-03-01

    Full Text Available Hoe reik die reg uit na die seksueel gemolesteerde kind? As na die reg in wye verband gekyk word, sou dit alie wetgewing en alle gemeneregsbeginsels en alle regsprosedures insluit waardeur die Staat poog om molestering te voorkom en die gemolesteerde kind in beskerming te neem. Dit le baie wyd en sou byvoorbeeld die maatreels insluit van die Kindenvet 33 van 1960; die Wet op Egskeiding 70 van 1979; die Wet op Kindersorg 74 van 1983; die Wet op die Status van Kinders 82 van 1987 en die Wet op Bemiddeling in Sekere Egskeidingsaangeleenthede 24 van 1987. Eersdaags sal dit moontlik ook ’n Manifes vir die Regte van Kinders insluit wat vermoedelik geskoei sal wees op die W O se Konvensie vir die Regte van die Kind (1989 w a arv an die RSA tan s nog nie ’n ondertekenaar is nie.

  6. Die rol van die bruikbaarheidsbenadering binne die e-leksikografie

    Directory of Open Access Journals (Sweden)

    André H. du Plessis

    2017-04-01

    Full Text Available In die ontwikkeling van die teoretiese leksikografie was die primêre fokus van metaleksikograwe vroeër meestal op modelle vir die daarstelling van gedrukte woordeboeke. Soos die tegnologie vooruitgang maak, verskuif daardie fokus nou na elektroniese woordeboeke. Die ontwikkeling van woordeboeke as elektroniese produkte vestig tans die aandag op ’n leemte in die metaleksikografie. Hierdie leemte het gevolge vir die bestaande teoretiese modelle waarvolgens woordeboeke ontwerp word, asook die praktiese ontwikkeling van volwaardige leksikografiese naslaanbronne vir die toekoms. Elektroniese data- of inligtingsdraers soos woordeboeke is nie beperk tot die leksikografie nie, maar vind ook neerslag in ander velde soos inligtingstegnologie en taaltegnologie. Vir die bestaande leksikografieteorieë om suksesvol aan te pas by die elektroniese sfeer, moet daar aandag gegee word aan die fisiese en tegnologiese eienskappe van verskillende e-instrumente. Hierdie eienskappe moet aan sekere internasionale vereistes voldoen wat nie noodwendig altyd deur leksikograwe in ag geneem word nie. Deur gebruik te maak van die bruikbaarheidsbenadering en ander bruikbaarheidsteorieë kan die bestaande leksikografiese beginsels makliker en beter aangepas en toegepas word binne die elektroniese ruimte. Hierdie studie beoog daarom om die belangrikheid van die bruikbaarheidsbenadering vir (en die oorvleueling met die e-leksikografie bloot te lê en om te bewys hoe elektroniese woordeboeke nie sonder ander interdissiplinêre beginsels vanuit die tegnologiese sfeer ontwikkel behoort te word nie.

  7. Die sin en sintaksis in die Bantoetale

    Directory of Open Access Journals (Sweden)

    J. Breed

    1964-03-01

    Full Text Available Waar ek my ten doel stel om in hierdie rede die soek- lig op die sin en sintaksis te laat val, wil ek dit voorop stel dat die studie uit die aard van die saak alleen daarop gerig kan wees om die riglyne vir ’n sintaktiese beskrywing vir die Bantoetale te trek, en nie om ’n volledige beskrywing van die tale se sinsbou te gee nie. Die Departement Bantoetale het ’n tweeledige taak, nl. ’n praktiese en ’n akademiese; om die rede is die onderhawige probleem ’n dringende.

  8. DIE PROGESTEROONKONSENTRASIE IN DIE BLOEDPLASMA VAN

    African Journals Online (AJOL)

    plaasvind en alreeds binne 48 tot 72 vur voltooi is. Edgar & Ronaldson (1958) vind dat die periode vanaf die degenerasie van die corpus luteum totdat die eerste tekens van estrus waargeneem word by die ooi ongeveer. 2 dae is. Die seisoenseffek op progesteroonsekresie. Uit Fig. I is daar. 'n duidelike seisoenseffek ten ...

  9. Die volwassenheid van die bourekenaar se kontraktuele ...

    African Journals Online (AJOL)

    Die doel van hierdie artikel is om die beginsels wat die bourekenaar ondersteun om kontraktueel effektief te kommunikeer, te identifiseer en te meet om die standaard van die volwassenheid van die bourekenaar se bourekenkundige kontraktuele kommunikasie te bepaal. Hierdie artikel vorm deel van 'n volledige studie oor ...

  10. Die Heimkunft

    Directory of Open Access Journals (Sweden)

    Stephen Romer

    2009-05-01

    Full Text Available En hommage amical à René Gallet.Die HeimkunftRuhig glänzen indes die silberen Höhen darüber,Voll mit Rosen ist schon droben der leuchtende Schnee.- HölderlinAnd then one day the young master returnsfrom a dark placeand birdsong leads the wanderer inand the cat yawns and curls againin the headiness of this instantthe house is fragrantwith woodsmoke and honeysucklewhich is a kind of accomplishment.Returning from dogmahome to the humanehe lays asideknapsack, alpenstock and hat,goes straight to t...

  11. Comparative Study on Dispersion and Interfacial Properties of Single Walled Carbon Nanotube/Polymer Composites Using Hansen Solubility Parameters

    DEFF Research Database (Denmark)

    Ma, Jing; Larsen, Mikael

    2013-01-01

    Dispersion and interfacial strain transfer of single walled carbon nanotubes (SWNTs) are two major challenges for the utilization of SWNTs as reinforcements in polymer composites. Surface modifications could help change the dispersion and interfacial properties. In this study, nanocomposites were...... fabricated by solution blending 1 wt % SWNTs with various modification (nonmodified, nitric acid functionalized, and amine functionalized SWNTs) and three kinds of polymeric materials (polycarbonate, polyvinylidene fluoride, and epoxy). Chemical compatibilities between SWNTs and solvents or polymers...

  12. Die funksie van die belydenis in die struktuur van die kerk en die ...

    African Journals Online (AJOL)

    n\\ente nie almal in dieselfde sin van die woord belangrik is nie en dat sommiges hiervan 'n prioriteit oor ander toekom. Dit is verder ook waar dat daar 'n gedurige wisselwerking tussen hierdie verskillende elemente is. Hulle vul mekaar wedersyds aan en het mekaar nodig met die gevolg dat die struktuur van die kerk nie ...

  13. Riglyne uit die verlede vir die sendingwerk van die toekoms

    Directory of Open Access Journals (Sweden)

    J. M. Cronj�

    1983-09-01

    Full Text Available Wanneer daar dan oor "riglyne" uit die verlede vir die sendingwerk van die "toekoms" gehandel word, is dit �n riskante onderneming. Te meer nog as gevolg van skrywer se noue kontak met die buitelandse sending van die Ned. Geref. Kerk, wat sy objektiwiteit mag be�nvloed. Te midde van die risiko's daaraan verbonde en met vermyding van bogenoemde slaggate so ver moontlik, wil ons tog probeer om sekere riglyne te trek wat moontlik ook rigtinggewend vir die uitgebreide sendingwerk van die Kerk in die toekoms kan wees.

  14. Die ouderling en die regeervergaderings in die Nederduitsch ...

    African Journals Online (AJOL)

    van ecn gee. Die oomblik egtcr as daar een of meer vakatures vir ouderlinge ontstaan, is die balans versteur. Die wanbalans kan natuurlik selb ook vergroot word indien soos soms gebeur, die kassier en die skriba diakens sonder wyke sou wees. 'n Groter wanbalans, wat egter waarskynlik nooit eens opgemerk word nie, ...

  15. Die casting

    Science.gov (United States)

    1980-11-01

    Contents include: Indian diecasting industry, its problems and prospects; push-button locks; 9th International Diecasting conference and 8th exhibition; seminar on gating of diecasting dies and diecasting technology; and the 6th student industrial design competition--Uk. New publications and abstracts are presented.

  16. . , , die Boesmans

    African Journals Online (AJOL)

    "made captive in early boyhood, with other children of a Bushman. Kraal, in one of the frequent incursions or commandos" (Pereira &. Chapman, 1989:157). Dit eindig met Pangóla wat sterf in 'n soortgelyke ongelyke geveg tussen berede boere en omsingelde Boesmans - gewere teen pyl-en-boë: "I die in arms against the ...

  17. Calvyn en die Calvinisme

    African Journals Online (AJOL)

    krasie soos by Rome afv^rys, maar daardeur het hy ons insiens dié eg-Calvynse teokrasie waarby die kerk direk betrokke is, prysgegee. Ek glo dat hier ook die wortels lê van sy afwysing van die 'volkskerk'- gedagte; nie die volkskerk in die sin dat die toebehorentheid aan die volk tegelyk toebehorentheid tot die kerk ...

  18. Die universiteit en die goeie lewensorde

    African Journals Online (AJOL)

    op Hippocrates, Galenus en Avicenna, lettere op Aristoteles, en ná die. Reformasie sou Luther, Melanchton en Calvyn vir Petrus Lombardus aan dié universiteite vervang wat vir die Reformasie gekies het, maar sou die ander fakulteite in hoofsaak onaangeraak bly. Die universiteit het sy tradisie binne die voile stroom van ...

  19. Exsodus van die Boerevolk

    Directory of Open Access Journals (Sweden)

    A. J. H. van der Walt

    1938-03-01

    Full Text Available Die Groot Trek het in sekere sin begin toe in die begin van die 18e eeu die eerste veeboer-pionier sy gesin, sy huisraad en sy plaasgereedskap op sy kakebeenwaens gelaai het en na sy veepos, voortaan sy leningsplaas, verhuis het. Want alhoewel die Groot Trek nóg logies nóg histories ’n voortsetting van die 18e eeuse trekbeweging is nie, is die eerste sonder die laaste tog ondenkbaar. Die 18e eeuse verspreiding het die geharde Afrikaanse baanbreker gevorm, ’n mens met weinig behoeftes, en met die selfstandigheid en die handigheid om in daardie behoeftes self grotendeels te voorsien uit die betreklik skrale materiaal wat die bodem hom gebied het. Dit het die Afrikaanse binnelandbewoner fisies en psigologies mobiel gemaak en in hierdie mobielmaking lê die noodwendige voorwaarde vir die moontlikheid van die latere groot volksbeweging.

  20. Ensiklopedisiteit in die

    African Journals Online (AJOL)

    Mev. R.B. Ruthven

    Opsomming: Die Woordeboek van die Afrikaanse Taal (voortaan WAT) het vanaf die negende deel wegbeweeg van 'n meer ensiklopediese aanbod van inligting. Hiervoor het die woordeboek heelwat lof van teoretici ontvang. Die mening is egter ook uitgespreek dat die WAT wat leksiko- grafiese funksie betref meer op die ...

  1. die effek van speenouderdom op die produksievermoe van die sog

    African Journals Online (AJOL)

    lonsequcntty the early weaned sows produced significantly more piglets per annum (22,5 vs 20,1). OPSOMIIiING: Die effek van speenouderdom, toegepas vir die eerste vyf agtereenvolgende laktasieperiodes van die sog, op die produksievermod van ...

  2. DIE GEESTESSTRUKTUUR VAN DIE ONGELOOF In die studie van ...

    African Journals Online (AJOL)

    Test

    KARL MARX (1818-1883) en FRtEDRiCH ENGELS (1820-1895) aan vaar hierdie standpunt van FEUERBACH ten opsigte van die godsdiens as onomstootlik. FEUERBACH gaan egter nie ver genoeg nie; hy moes ook gevra het: waarom überhaupt projekteer die mens sy wese in die gestalte van 'n God? Die godsdiens is ...

  3. die sinodale verband van die nederduitse gereformeerde kerk in die ...

    African Journals Online (AJOL)

    Liezel

    die OVS 1865-1912:10:05:1865 e.v.d.; Pro Memoria of voorwoord; Oberholzer. s.a.:73). Hoewel die eerste sinode as 'n vergadering van die verband eers van 10 tot 13 Mei 1865 in Bloemfontein gehou is, is die verband self by hierdie vergadering in Smithfield gevorm. 1. In aansluiting by Gerdener praat Oberholster van ...

  4. Die funksie van die skeppingstradisie in die boek Jeremia

    African Journals Online (AJOL)

    dition of creation in Jeremiah' and, secondly, to discuss the relevance of the conclusions ... niskomplekse wat handel oor die groot dade van Jahwe in die geskiedenis van sy volk. • A1 hierdie gedeeites kan .... In vier hoofstukke (nl 4, 5, 27 & 31) word verwysings na die skeppingstradi sie gekombineer met verwysings na die ...

  5. DIE ROL VAN DIE TAALWETENSKAP IN DIE ONTWIKKELING VAN ...

    African Journals Online (AJOL)

    Tod'orov en Barthes ond~rsoek byvoorbeeld' verhaalstrukture in die algemeen, of hulle:nou binne.die.letterkunde voorkom of daarbuite. In sy boek, Structuralist Poetic!>, vestig Jonathan Culler weer die aandag op dit wat eie aan die letterkund'e is: literere konvensies. Dat d'aar sulke uniek-literere konvensies bestaan, kan ...

  6. Die 'verleentheid' van die teoloog voor die teodiseeprobleem

    African Journals Online (AJOL)

    KRISIS VIR GOD SE GEREGTIGHEID? Die raaisel dat 'goeie' mense moet ly, bly steeds een van die brandenste vraagstukke onder gelowiges. Een rede is dat talle mense glo dat die. 'daad-gevolg-samehang', soos dit in die wysheidsliteratuur bekend geword het (vgl oa Schmid 1974: 64-90; Kutsch 1973: 197-214; Kaiser.

  7. Die gesigte van die neo-marxisme

    Directory of Open Access Journals (Sweden)

    M. C. Boshoff

    1979-05-01

    Full Text Available Ons weet nie sondermeer wat die voorsetsel ‘NEO’ beteken nie. Het Marx in ons tyd herleef of ’n ombuiging, hersiening, aanvulling of selfs ’n korrektief op die oorspronklike visie van Marx gekom? Wat hou die naam, doelstellings en gees van Karl Marx lewendig en dreig om die Westerse lewenswyse en die Christelike godsdiens te vernietig met ’n leefwyse wat die Christelike geloof op sy kardinale punte aanval?

  8. Die gesigte van die neo-marxisme

    Directory of Open Access Journals (Sweden)

    M. C. Boshoff

    1979-06-01

    Full Text Available Ons weet nie sondermeer wat die voorsetsel ‘NEO’ beteken nie. Het Marx in ons tyd herleef of ’n ombuiging, hersiening, aanvulling of selfs ’n korrektief op die oorspronklike visie van Marx gekom? Wat hou die naam, doelstellings en gees van Karl Marx lewendig en dreig om die Westerse lewenswyse en die Christelike godsdiens te vernietig met ’n leefwyse wat die Christelike geloof op sy kardinale punte aanval?

  9. Die invloed van ‘n intensiewe opleidingsprogram op die Kardio Stres-indeks

    Directory of Open Access Journals (Sweden)

    Tammy Claassen

    2012-03-01

    Full Text Available Mense ondervind baie stressors in hul alledaagse lewe, wat ‘n groot uitwerking het op daagliksefunksionering. Kardio Stres-indeks (KSI is ‘n nie-indringende mate van die stres wat die hartervaar. KSI (uitgedruk as ‘n persentasie berekeninge word gebaseer op die duur van die QRSkompleks, hart tempo, ritme en standaardafwyking van die RR-interval (RRSD spesifieke parameters.

  10. Natural organic matter (NOM) adsorption to multi-walled carbon nanotubes: effect of NOM characteristics and water quality parameters.

    Science.gov (United States)

    Hyung, Hoon; Kim, Jae-Hong

    2008-06-15

    The effect of natural organic matter (NOM) characteristics and water quality parameters on NOM adsorption to multiwalled carbon nanotubes (MWNT) was investigated. Isotherm experiment results were fitted well with a modified Freundlich isotherm model that took into account the heterogeneous nature of NOM. The preferential adsorption of the higher molecular weight fraction of NOM was observed by size exclusion chromatographic analysis. Experiments performed with various NOM samples suggested that the degree of NOM adsorption varied greatly depending on the type of NOM and was proportional to the aromatic carbon content of NOM. The NOM adsorption to MWNT was also dependent on water quality parameters: adsorption increased as pH decreased and ionic strength increased. As a result of NOM adsorption to MWNT, a fraction of MWNT formed a stable suspension in water and the concentration of MWNT suspension depended on the amount of NOM adsorbed per unit mass of MWNT. The amount of MWNT suspended in water was also affected by ionic strength and pH. The findings in this study suggested that the fate and transport of MWNT in natural systems would be largely influenced by NOM characteristics and water quality parameters.

  11. Evaluation of permanent die coatings to improve the wear resistance of die casting dies. Final project report, January 1, 1995--April 30, 1997

    Energy Technology Data Exchange (ETDEWEB)

    Shivpuri, R.

    1997-09-18

    Die Casting dies are subject to severe service conditions during the die casting operation. While these severe conditions are necessary to achieve high production rates, they cause the dies which are commonly made of H13 die steel, to suffer frequent failures. The major die failure mechanisms are erosion or washout, Heat checking, soldering and corrosion. Due to their geometrical complexity, die casting dies are very expensive (some dies cost over a million dollars), and thus a large number of parts have to be produced by a die, to justify this cost and leverage the advantages of the die casting process (high production rates, low manpower costs). A potential increase in the die service life, thus has a significant impact on the economics of the die; casting operation. There are many ways to extend die life: developing new wear resistant die materials, developing new surface treatments including coatings, improving heat treatment of existing H13 dies, using better lubricants that can protect the die material, or modifying the die geometry and process parameters to reduce the intensity of wear. Of these the use of coatings to improve the wear resistance of the die surface has shown a lot of promise. Consequently, use of coatings in the die casting industry and their wide use to decrease die wear can improve significantly the productivity of shop operations resulting in large savings in material and energy usage.

  12. Die Afrikaanse Verklarende Musiekwoordeboek

    African Journals Online (AJOL)

    betroubaarheid. Ook die Duitstalige "regterhand" van die musikoloog, die. Riemann Musiklexikon (Sachteil, 1967, en twee Personenteile, asook twee Supple- mente tot 19.), is "verklarend", met literatuuropgawes. Die gewenstheid van die A VM ten spyt, is dit egter moeilik om ongekwa- lifiseerde geesdrif vir die boek te he.

  13. Die Nagmaal en broodgebrek

    African Journals Online (AJOL)

    p1243322

    Word byvoorbeeld honger in die. Nagmaal, as element van die liturgie, gereflekteer en ook gekonfronteer? Moet die hartverskeurende situasie van honger gesinne nie ter sprake kom wanneer die gemeente die “maaltyd van die Here” (cdh*o mnm jtqh`jn.m) (1. Kor 11:20) eet en drink nie? Christus het immers in Matteus 25 ...

  14. DIE SLAG VAN BLOEDRIVIER~

    African Journals Online (AJOL)

    van die betekenis watdie Slag van Bloedriviervir die Suid-Afrikaansemilitere geskiedenis inhou, is Bloedrivier een van die slagvelde in die land wat die volledigste gerekonstrueer is. Voetnote. 1. J. J. Oberholster: Die Historiese Monumente van Suid-Afrika, p. 279. 2. H. J. Hofstede: Geschiedenis van den Oranje-Vrijstaat,.

  15. Modeling of Uneven Flow and Electromagnetic Field Parameters in the Combustion Chamber of Liquid Rocket Engine with a Near-wall Layer Available

    Directory of Open Access Journals (Sweden)

    A. V. Rudinskii

    2015-01-01

    Full Text Available The paper concerns modeling of an uneven flow and electromagnetic field parameters in the combustion chamber of the liquid rocket engine with a near-wall layer available.The research objective was to evaluate quantitatively influence of changing model chamber mode of the liquid rocket engine on the electro-physical characteristics of the hydrocarbon fuel combustion by-products.The main method of research was based on development of a final element model of the flowing path of the rocket engine chamber and its adaptation to the boundary conditions.The paper presents a developed two-dimensional non-stationary mathematical model of electro-physical processes in the liquid rocket engine chamber using hydrocarbon fuel. The model takes into consideration the features of a gas-dynamic contour of the engine chamber and property of thermo-gas-dynamic characteristics of the ionized products of combustion of hydrocarbonic fuel. Distributions of magnetic field intensity and electric conductivity received and analyzed taking into account a low-temperature near-wall layer. Special attention is paid to comparison of obtained calculation values of the electric current, which is taken out from intrachamber space of the engine with earlier published data of other authors.

  16. Die opkoms en die betekenis van die Ooste

    Directory of Open Access Journals (Sweden)

    G.D. Scholtz

    1968-03-01

    Full Text Available Die vraag ontstaan onmiddellik: wat word bedoel met die Ooste? Wanneer die saak ontleed word, blyk dit dat dit nie ’n vaste begrip is nie. Wanneer daar van die Ooste gepraat word, stel iemand hom op Europese standpunt. Alles wat ten ooste van Europa geleë is, is die Ooste. Dit beteken derhalwe dat die Ooste, Asië is. Waar begin Asië egter en waar eindig dit? Hierdie vraag is van sowel aardrykskundige as geskiedkundige belang.

  17. Experimental Investigation of Process Parameters in Drilling LM25 Composites Coated with Multi Wall Carbon Nano Tubes Using Sonication Process

    Directory of Open Access Journals (Sweden)

    Sangeetha M.

    2017-09-01

    Full Text Available Aluminium based metal matrix composites are widely used in automobile components such as cardan shaft of Chevrolet corvette, disc brake and engine push rod. In this experiment a Hybrid Metal Matrix Composites (HMMC are fabricated and drilled. Drilling is the process of making slots in disc brake and thread in the engine parts. The surface quality of the drilled specimen depends on the speed, feed, drill type and the thrust force. Thrust force plays the major role in drilling the specimen. In this experiment HMMCs are fabricated using two processes-called, sonication and casting. Sonication is the process of coating the carbon nanotubes over the silicon carbide particles (SiCp. Semisolid stir casting is used to reinforce the coated SiCp in the LM 25 alloy. A drilling process is performed on HMMC to analyse the extent to which the input parameters influence the thrust force and Ovality. The tools used for drilling are solid carbide tools of three different diameters. Taguchi’s experimental design is adopted for the drilling operation. A mathematical model is used to determine the influence of input parameters on the outputs thrust force and ovality. This paper proves the combination of N3, f1 and d1 of the carbide tool results in the lowest value of thrust force and ovality while drilling HMMCs. In this work the HMMC is prepared by coating the abrasive nature, silicon carbide particle and there is a good interfacial bonding between the reinforced particle and matrix and the drilling process becomes smoother. The new being of this article is the treated ceramics, SiCp with carbon nanotubes. This HMMC shows the improved mechanical properties compared to other metal matrix composites surveyed in the literatures.

  18. Die Voortrekker-Monument

    Directory of Open Access Journals (Sweden)

    Gerard Moerdyk

    1938-03-01

    Full Text Available Die Eeufeesjaar is vir die Afrikaner ’n tydperk van besieling. Nog nooit sedert die ontstaan van ons volk het een enkele gebeurtenis soveel nasietrots gewek as die honderdjarige herdenking van die Groot Trek. Vir die eerste keer in ons geskiedenis voel ons ons nie meer Kapenaars, Vrystaters, Natalers, en Transvalers nie, maar Afrikaners, saamgesnoer deur die tradisies van ’n selfstandige kultuurvolk. Wanneer die klimaks van die Ossewatrek met die hocksteenlegging van die Voortrekker-Monument bereik word, sal die besieling nie uitsterf nie, die krag wat geskep is sal bly voortgroei tot ’n onweerstaanbare mag. Die Afrikaner sal homself vind, en as die Monument na sowat vyf jaar onthul word, sal die saad wat in hierdie jaar gesaai is, tot voile rypheid gekom het. Dan sal die Monument self tot die volk spreek; intussen egter, is dit wenslik, nee noodsaaklik selfs, om die Monument aan die Afrikaners te verklaar, om ‘n uiteensetting te gee van die noodsaaklikheid van so ’n Monument, sowel as om die motief te verduidelik wat as inspirasie gedien het vir die ontwerpdaar van.

  19. DIE DIALEKTIEK IN DIE WAARDES VAN DIE 1996 GRONDWET 1 ...

    African Journals Online (AJOL)

    Administrator

    Steytler A Charter for Social Justice: a Contribution to the South African Bill of Rights Debate (1992). 17-18. 5 Dit geld ... As die norma nie. 'n hoek van negentig grade maak nie, is dit hoogs onwaarskynlik dat die mure van die spreekwoordelike bouwerk van 'n nuwe grondwetlike bedeling reghoekig opgetrek sal word.

  20. die rol van die eerste suid- afrikaanse infanteriedivisie tydens die ...

    African Journals Online (AJOL)

    rug. Hier het sy magte hulle vasgeloop in voorafbeplande gekonsentreerde vuurkrag von die Britse ortillerie en tenkvuur vanuit romponderstellings wat die Britse pantser in stoat gestel het om sy tenks in die ope aan te durf terwyl hulle agter dekking was.16. Rommel het presies opgetree soos wat Montgomery beplan het.

  1. Wat is die reg en die vryheid van die eksegeet?

    African Journals Online (AJOL)

    voorgestaan terwyl die Antiocheense skool (Joh Chrysostemos en. Theodorus van Mopsuesta) weer as eksegese gesien het 'n meer letterlike verklaring van die Bybel. Augustinus en Hieronimus het probeer om die twee metodes te kombineer, terwyl Petrus. Lombardus, Alexander van Hailes en Thomas Aquinas 'n vier-.

  2. Rembrandt en die Bybel.

    Directory of Open Access Journals (Sweden)

    G. Dekker

    1951-03-01

    Full Text Available Onlangs het ek in ’n Nederlandse weekblad iets gelees wat tot diepnadenke stem. Dit was die uitspraak van ’n ontwikkelde Oosterling wat sy groot bewondering vir die Westerse kultuur betuig het en sy besef van wat dit nog vir die Ooste sal beteken. Maar, het hy besluit,wat die Weste tot daardie hoogte laat styg het, is die Christendom, en die Christelike geloof is nie ineer die bronaar van sy geestelike lewe nie.

  3. Temas uit die kerkgeskiedenis

    Directory of Open Access Journals (Sweden)

    J. H. van Wyk

    1993-06-01

    Full Text Available Dit is natuurlik 'n onbegonne taak om enigsins 'n poging aan te wend om 'n volle beeld van twee milleniums kerkgeskiedenis voor te hou. Wat die kerkgeskiedenis van Afrika betref, leef ons tans in die periode van die derde vestiging van die kerk in Afrika. Die eerste periode was aan die begin van ons Christelike jaartelling in Noord-Afrika en het groot name soos Tertullianus (+220, Cyprianus (+258 en Augustinus (+430 opgelewer. Die tweede periode was gedurende die vyftiende en sestiende eeu in Wes- en Oos-Afrika. In albei gevalle het die Christendom feitlik tot niet gegaan - iets waarna ons later weer sal verwys.

  4. Die skeppingsordeninge en homoseksualiteit

    African Journals Online (AJOL)

    steun op Aristoteles of Descartes wat betref die Godsleer, predestina- sieleer, die natuurlike teologie en die leer van die skepping en voor- sienigheid. Barth noem dit 'n dubbele boekhouding wat die natuur en genade, skepping en verbond, skeppingsopenbaring en heilsopenba- ring van mekaar losmaak. Sy kritiek is veral ...

  5. Die rol van die blanke werker in die motivering van die swart werker

    Directory of Open Access Journals (Sweden)

    G. J. Oosthuizen

    1980-11-01

    Full Text Available The motivation of the Black worker can not be studied in isolation since the White worker still holds many executive positions and therefore has an influence on the Black workers' motivation. The role of the White worker in motivating the Black worker in a specific organisation and the attitude and leadership approach of the White worker on the existence/nonexistence and relative satisfaction of the needs of Black workers are discussed.Opsomming Die motivering van die Swart werker kan nie in die huidige situasie in isolasie bestudeer word nie, omdat die Blanke werker steeds in die bestuursposisie is en daarom die motivering van die Swart werker kan beïnvloed. Hierdie ondersoek was daarop gerig om die rol van die Blanke werker in die motivering van die Swart werker nader te ondersoek. Die houding en die leierskapsbenadering van die Blanke werker teenoor die Swart werker is gemeet, asook die behoeftes wat volgens die Blanke werker by die Swart werker bestaan, bevredig is, of nie bestaan nie. Die behoeftes van Swart werkers, soos deur hulleself gesien, is ook ondersoek. Ten opsigte van sekere aspekte is beduidende verskille gevind.

  6. ,,Die kleur-krisis en die Weste"

    Directory of Open Access Journals (Sweden)

    J. H. Coetzee

    1953-03-01

    Full Text Available Wie vandag onbevange en met ’n opregte begeerte na die volle waarheid oor die sogenaamde „kleurvraagstuk” in Suid-Afrika wil skryf, moet voorwaard bid dat hom die deel van Esegiël te beurt mag val: „Jou voorhoof maak ek hard soos ’n diamant, harder as ’n rots . . . ."

  7. Die funksie van ruimte in die narratologie

    African Journals Online (AJOL)

    Venter (1985: 20 vv) is van mening dat hierdie negatiewe beoorde- ling van ruimte as blote 'vulling' (Venter 1985: 20) die beginsel was waarvolgens Plato in die ouer literêre paradigma byvoorbeeld die Ilias van Homerus so beskryf het dat alle ruimtelike gegewens sover moont- lik weggelaat is. Hiervolgens kon ruimte te ...

  8. KERKWEES IN DIE

    African Journals Online (AJOL)

    KERKWEES IN DIE BRANDING: DIE NEDERDUITSE GEREFORMEERDE. KERK IN ALGEMENE SINODALE VERBAND. 1994-2011. ACTA THEOLOGICA. Supplementum 18. 2013. INHOUD. HOOFSTUK 1 Verantwoording. 1. HOOFSTUK 2 Die Sinode van versoening? 4. HOOFSTUK 3 Bestendiging in 'n nuwe bedeling.

  9. Die Institusie van Calvyn.

    Directory of Open Access Journals (Sweden)

    J. C. Coetzee

    1951-03-01

    Full Text Available Ek wil hier geen verhandeling oor Calvyn se onderwysing in die Christelike godsdiens skrywe nie maar net die aandag vestig op die feit dat hierdie werk van Calvyn nou ook in Afrikaans verkrygbaar is.

  10. e .Kuraioriufn. DIE W ETENSKAPLIKE BETEKENIS VAN DIE W ERK ...

    African Journals Online (AJOL)

    Test

    Voorts wys hy op die talryke name wat saamgestel is met die naam van die koningsfiguur, ditsy n aardse koning of n godheid. Die a!gemeen oosterse vergoddeliking van die koning het sy invloed ook laat geld op die naamgewing in die ou Babel en Assur. Geheel die proefskrif getuig van die deeglikheid en noukeurigheid.

  11. Materials on dies for pressure die casting

    Directory of Open Access Journals (Sweden)

    E. Ragan

    2012-01-01

    Full Text Available In the contribution the stress of die materials of thermal fatigue is defi ned and material life is derived theoretically and compared with the measured values. The important properties of the die materials as thermal conductivity, coeffi cient of thermal expansivity, modulus of elasticity and mechanical properties are described. Binding to it single die materials as carbon steels and chrome-tungsten steels are analyzed. As the perspective die material for pressure die casting of ferrous metals appears molybdenum with regard to advantageous properties.

  12. Homogenity of Die Casting and Returning Material

    Directory of Open Access Journals (Sweden)

    J. Malik

    2012-04-01

    Full Text Available Homogeneity of die castings is influenced by wide range of technological parameters as piston velocity in filling chamber of die casting machine, filling time of mould cavity, temperature of cast alloy, temperature of the mould, temperature of filling chamber, surface pressure on alloy during mould filling, final pressure and others. Based on stated parameters it is clear, that main parameters of die casting are filling time of die mould cavity and velocity of the melt in the ingates. Filling time must ensure the complete filling of the mould cavity before solidification process can negatively influence it. Among technological parameters also belong the returning material, which ratio in charge must be constrained according to requirement on final homogeneity of die castings. With the ratio of returning material influenced are the mechanical properties of castings, inner homogeneity and chemical composition.

  13. Prediction of fracture parameters of circumferential through-wall cracks in the interface between an elbow and a pipe under internal pressure

    Energy Technology Data Exchange (ETDEWEB)

    Jang, Youn Young; Huh, Nam Su [Dept. of Mechanical System Design Engineering, Seoul National Univ. of Science and Technology, Seoul (Korea, Republic of); Jeong, Jae Uk [Doosan Heavy Industries and Construction, Changwon (Korea, Republic of)

    2016-09-15

    This paper provides plastic influence functions of GE/EPRI method for calculating J and Crack opening displacement (COD) of pipes with a circumferential Through-wall crack (TWC) in the interface between an elbow and a straight pipe by using 3-dimensional (3-D) elastic-plastic finite element analyses for Ramberg-Osgood (R-O) materials, in which internal pressure was considered as a loading condition. The proposed plastic influence functions are tabulated as a function of the pipe geometries, crack length and strain hardening exponent. In order to provide sufficient confidence for the proposed plastic influence functions, the estimation scheme using the proposed plastic influence functions for J and COD of cracked elbows was validated against FE results using R-O parameters for the SA312 TP316 stainless steel. Moreover, the predicted J and COD for elbows with a TWC in the interface between an elbow and a pipe by the proposed scheme were compared with those for cracked straight pipes to investigate the effect of the elbow geometries on crack behavior of elbows. One important point is that crack behaviors in the interface between an elbow and a straight pipe can be significantly different with those in straight pipes according to pipe thickness, crack length and bend radius of elbows. Thus, the proposed plastic influence functions can be useful to predict accurate J and COD for cracked elbows.

  14. Dynamic {sup 31}P-MR-spectroscopy of the quadriceps muscle. Influence of sex and age on spectroscopic results; Die dynamische 31-Phosphor-Magnetresonanz-Spektroskopie des M. quadriceps. Einfluss von Geschlecht und Alter auf spektroskopische Parameter

    Energy Technology Data Exchange (ETDEWEB)

    Schunk, K.; Romaneehsen, B.; Kessler, S.; Schadmand-Fischer, S.; Thelen, M. [Mainz Univ. (Germany). Klinik und Poliklinik fuer Radiologie

    1999-05-01

    Purpose: {sup 31}P-MRS is used to assess the influence of sex and age on quadriceps muscle metabolism before and after exercise. Materials and Methods: 32 healthy volunteers (15 women, 17 men; mean age: 38{+-}17 yrs.) were examined by dynamic phosphorus-31 ({sup 31}P) magnetic resonance spectroscopy (MRS). In the magnet, the quadriceps muscle was stressed by an isometric and an isotonic form of exercise until exhaustion, respectively. Results: Resting conditions: With increasing subjects` age, the ratio {beta}-adenosine triphosphate/total phosphate decreased (r=-0.37; p=0.02). With increasing subjects` age, the ratios inorganic phosphate/phosphocreatine (r=0.79; p=5x10{sup -8}), phosphomonoester/{beta}-adenosine triphosphate (r=0.74; p=10{sup -6}) and phosphodiester/{beta}-adenosine triphosphate (r=0.62; p=10{sup -4}) increased. The pH was the only one of the evaluated spectroscopic parameters which showed a sex-dependence: Female subjects had a significantly lower pH (7.03{+-}0.02) than male subjects (7.05{+-}0.03; p=0,01). Exercise: With increasing age, the maxima of inorganic phosphate/phosphocreatine were less extreme during both of the exercises (r=-0.42; p=0.0005). Likewise, the exercise-induced acidosis was less severe with increasing age (r=0.53; p=6x10{sup -6}). After the end of the exercise, the times of half recovery of inorganic phosphate/phosphocreatine and the pH correlated neither with the subjects` age nor with sex or cross-sectional area of the quadriceps muscle. Conclusion: Sex and age of volunteers affect spectroscopic results. This influence has to be considered in the interpretation of spectroscopic studies. (orig.) [Deutsch] Ziel: Die Ueberpruefung des Einflusses von Geschlecht und Alter gesunder Probanden auf phosphorspektroskopische Ergebnisse. Material und Methodik: 32 gesunde Probanden (15 Frauen, 17 Maenner) mit einem Durchschnittsalter von 38{+-}17 Jahren wurden mit der dynamischen 31-Phosphor-Magnetresonanz-Spektroskopie (MRS

  15. Die vrede van Münster / Westfale en die betekenis daarvan vir die ...

    African Journals Online (AJOL)

    In die Suid-Afrikaanse kerkgeskiedenis egter is die Vrede van Münster as epogmakende gebeure tot dusver nie net in die algemeen verwaarloos nie, maar boonop is die direkte verband tussen hierdie sentrale historiese baken aan die een kant en aan die ander kant die vestiging van die VOC se verversingspos aan die ...

  16. DIE KERKLIKE TUG * Die tug en die handhawing daarvan is n saak ...

    African Journals Online (AJOL)

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    Die tug en die handhawing daarvan is n saak van wesenlike belang vir die Kerk van die Here nie alleen nie, maar ook vir elke volk. Dit bepaal tot op sekere hoogte die geestelike peil van die Kerk en die sedelike peil van n volk. Van so groot belang word die tug beskou, dat die Nederlandse. Geloofsbelydenis in Art. 29 as ...

  17. Die Nuwe Testament en mitologie: Die probleem van die ...

    African Journals Online (AJOL)

    29 Mei 2015 ... as verwysingsraamwerk verkondig kan word. Indien wel, moet teologie die Christusverkondiging ontmitologiseer. (Bultmann [1941] 1967:16). Wat mites tot uitdrukking bring. Mites verklaar die kragte wat op mense inwerk en hulle lewens begrens, as bonatuurlik. 'n Mitiese kosmologie of wêreldbeskouing.

  18. Die belangrikste kenmerk van die diereproduksie- bedrywe oor die ...

    African Journals Online (AJOL)

    merking deurdat die benodigdhede aangegee word vir lam- mers van varierende massa wat teen verskillende tempos groei. Omdat daar egter 'n nouer interverwantskap tussen proteien· en energiebenodigdhede bestaan beveel Crampton. (1964) aan dat die proteien benodigdhede uitgedruk word in terme van VRP/mkal ...

  19. Whole-brain vessel wall MRI: A parameter tune-up solution to improve the scan efficiency of three-dimensional variable flip-angle turbo spin-echo.

    Science.gov (United States)

    Yang, Qi; Deng, Zixin; Bi, Xiaoming; Song, Shlee S; Schlick, Konrad H; Gonzalez, Nestor R; Li, Debiao; Fan, Zhaoyang

    2017-09-01

    To propose and evaluate a parameter tune-up solution to expedite a three-dimensional (3D) variable-flip-angle turbo spin-echo (TSE) sequence for whole-brain intracranial vessel wall (IVW) imaging. Elliptical k-space sampling and prolonged echo train length (ETL), were used to expedite a 3D variable-flip-angle TSE-based sequence. To compensate for the potential loss in vessel wall signal, optimal combination of prescribed T 2 and ETL was experimentally investigated on 22 healthy volunteers at 3 Tesla. The optimized protocol (7-8 min) was then compared with a previous protocol (reference protocol, 11-12 min) in terms of signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), vessel wall sharpness, and wall delineation quality on a 4-point scale (0:poor; 3:excellent) in 10 healthy volunteers. A pilot study of five patients was performed and lesion delineation score was used to demonstrate the diagnostic quality. A protocol with ETL = 52 and prescribed T 2  = 170 ms was deemed an optimized one, which, compared with the reference protocol, provided significantly improved wall SNR (12.0 ± 1.3 versus 10.0 ± 1.1; P = 0.002), wall-lumen CNR (9.7 ± 1.2 versus 8.0 ± 0.9; P = 0.002), wall-CSF CNR (2.8 ± 1.0 versus 1.7 ± 1.0; P = 0.026), similar vessel wall sharpness at both inner (1.59 ± 0.18 versus 1.58 ± 0.14, P = 0.87) and outer (1.71 ± 0.25 versus 1.83 ± 0.30; P = 0.18) boundaries, and comparable vessel wall delineation score for individual segments (1.95-3; P > 0.06). In all patients, atherosclerotic plaques (10) or wall dissection (5) were identified with a delineation score of 3 or 2. A parameter tune-up solution can accelerate 3D variable-flip-angle TSE acquisitions, particularly allowed for expedited whole-brain IVW imaging with preserved wall delineation quality. 2. Technical Efficacy: Stage 1 J. MAGN. RESON. IMAGING 2017;46:751-757. © 2017 International Society for Magnetic

  20. Die Diepte-ondersoek

    African Journals Online (AJOL)

    21 Aug 1971 ... Daarbenewens is die algemene lewensduurte ook verantwoordelik vir 'n stygende kostepatroon in die geneeskunde. 'n. Dekade of twee, drie gelede kon ons nog redelik verwag dat iedere pasient sy eie potjie moes krap, met die uitsondering van die werklik armes wat vry mediese dienste moes ontvang.

  1. Kinders in die erediens

    African Journals Online (AJOL)

    Roux neem in hierdie verband sterk standpunt in teen Jean Piaget en Ronald Goldman se teorieë oor kinderontwikkeling. Piaget oordeel dat kenmer- kende aspekte wat die kind se denke op 'n bepaalde stadium vertoon, die norm moet wees vir die bantering van die kind. Hy kategoriseer kinders volgens hulle intellektuele ...

  2. Die Hermeneutiek van Calvyn

    Directory of Open Access Journals (Sweden)

    L. Floor

    1980-06-01

    Full Text Available Wanneer ons Calvyn bestudeer dan is dit nie alleen belangrik om te luister na wat Calvyn sê nie, ons moet ook daarop let hoe hy die dinge sê. By die vak hermeneutiek is ons geneig om te spreek van ’n hermeneutiese metode. Daar word selfs gepraat van die tegniek van die eksegese.

  3. Die ontwikkeling van die bestuursmotiveringsvraelys (BMV

    Directory of Open Access Journals (Sweden)

    A. S. Engelbrecht

    1991-06-01

    Full Text Available The development of the Managerial Motivation Questionnaire (MMQ: Several criticisms of the psychometric suitability of existing measures of managerial motivation are reported in the literature. This study aimed at developing a new psychometrically sound instrument, the Managerial Motivation Questionnaire (MMQ. This was done on the basis of a comprehensive study of the literature on managerial motivation and the role-motivation theory. The preliminary MMQ was systematically shortened and refined until the final MMQ of 98 items was composed. This was based on social desirability and semantic appraisal, item analysis and factor analysis of the questionnaire. The results indicate that it was possible to develop a final MMQ that was relatively free of social desirability. It further demonstrated satsifactory internal consistencies on two samples (a = 0/90, N = 360; a = 0/91, N = 535, where all subscale items were found to be relatively pure measures of the isolated factors. Although some evidence was found providing support for the reliability of the MMQ, a need for further research on the construct validity of managerial motivation still exists. Opsomming In die literatuur word verskeie punte van kritiek teen die psigometriese geskiktheid van bestaande meetinstrumente van bestuursmotivering gerapporteer. Die doelstelling van hierdie studie was dus om aan die hand van die konseptuele omiyning van bestuursmotivering, en die rolmotiveringsteorie as algemene verwysingsraamwerk, 'n nuwe psigometries aanvaarbare meetinstrument, die Bestuursmotiveringsvraelys (BMV, te ontwikkel. Op grond van sosiale wenslikheids- en semantiese beoordeling, itemontleding en faktorontleding van die voorlopige BMV is die vraelys stelselmatig verkort en verfyn totdat die finale BMV van 98 items saamgestel is. Die resultate dui daarop dat hierdie studie wel daarin geslaag het om 'n finale BMV te ontwikkel wat relatief vry van sosiale wenslikheid is, bevredigende interne

  4. DIE KONINGSBEDE AS ELEMENT IN DIE KRONINGSRITUEEL. By ...

    African Journals Online (AJOL)

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    die besonder dink ons hier aan die bekende beskrywing van Salomo se bede. Nadat die offer gebring is, lê die koning homself te slape in die heiligdom, vgl. Gen. 28:11, kennelik met die bedoeling om n droomorakel te ontvang. Dit gebeur dan ook, altans volgens die teks in Kon.; volgens die Kronis gebeur meer: God self ...

  5. Demistifikasie van die metafoor “die kerk as bruid”

    African Journals Online (AJOL)

    p1243322

    5 Sep 2007 ... Stadelmann (1993:231) is hierdie onderdanigheid van die vrou aan haar man gegrond in die gedagte dat die man van God self die opdrag en verant- woordelikheid ontvang het om die hoof van die huwelik en die gesin te wees. Dit hou in dat die man deur God tot verantwoording geroep word oor wat in en.

  6. het die reformasie die leer gered en aanbidding verloor?

    African Journals Online (AJOL)

    Die reforma- tore het die voortgaande offer verwerp. Vir Rome aktualiseer die liturgie egter ook die nuwe verbond tussen God en mens (wat die reformatore aan- vaar het). Die liturgie is in die eerste plek werk van God aan ons mense voordat mense liturgies kan antwoord (Brienen 1978:17 e.v.). Die liturgie van Rome slaag ...

  7. Die sestienpersoonlikheidsfaktorvraelys as hulpmiddel by die takseersentrum

    Directory of Open Access Journals (Sweden)

    J. C. D. Augustyn

    1988-05-01

    Full Text Available The 16PF Personality Test as an aid to the assessment centre Assessment centres still remains costly and thime consuming. This study investigates the reduction of time and costs by the use of the 16 PF Personality Test as a method for measuring management dimensions. Promising results were obtained with a relatively small sample for the prediction of initiative and perseverance. Significant multiple correlations were also found for three criteria of management success. Further research may establish the use of the 16 PF as an aid to management assessment and thereby reduce the costs and time involved in assessment centres. Opsomming Takseersentrums se grootste probleem is gelee in die koste en tyd wat dit behels. Hierdie studie ondersoek die moontlikheid om beide te verminder deur die aanwending van die 16 PF Persoonlikheidsvraelys vir die meting van bestuursdimensies. Belowende resultate is met 'n relatiewe klein steekproef bevind ten opsigte van die voorspelling van inisiatiefen deursettingsvermoe. Beduidende meervoudige korrelasies is ook ten opsigte van drie kriteria van bestuursukses bevind. Verdere navorsing kan die gebruik van die 16 PF as hulpmiddel by bestuursevaluering vestig en sodoende die tydsduur en koste van takseersentrums verminder.

  8. Design and optimization of the low frequency eddy current technique for the volumetric inspection of austenitic small diameter tubes with a wall thickness up to 12 mm; Auslegung und Optimierung des Niederfrequenz-Wirbelstrom-Verfahrens fuer die volumetrische Pruefung von austenitischen Neben- und Kleinleitungen mit Wandstaerken bis 12 mm

    Energy Technology Data Exchange (ETDEWEB)

    Becker, R.; Bessert, S.; Disque, M.; Weiss, R. [Fraunhofer-Institut fuer Zerstoerungsfreie Pruefverfahren, Saarbruecken (Germany)

    1998-11-01

    The low-frequency eddy current technique discussed is a suitable external inspection technique detecting defects at the inner walls of small-diameter tubes and measuring their depths via the ligament. A testing system with optimized sensor lus software for image recording, evaluation, display and documentation is available. The current state of development of the system permits detection and measurement of defects up to 20 mm in size in austenitic inner walls 12.5 mm thick down to a depth of 3 mm. This applies both to the homogenous base metal and the weld with {delta} ferrite. (orig./CB) [Deutsch] Das vorgestellte Niederfrequenz-Wirbelstrom-Verfahren ist geeignet, bei Pruefung von aussen Fehler an der Innenseite von Klein- und Nebenleitungen nachzuweisen und ueber das Ligament deren Tiefe zu bestimmen. Ein entsprechendes Pruefsystem mit optimiertem Sensor und der Software zur Aufnahme, Auswertung, Darstellung und Dokumentation der Wirbelstrom-Urdaten steht zur Verfuegung. Beim jetzigen Entwicklungsstand liegt die Nachweisgrenze fuer einen 20 mm langen Innenfehler in einer 12.5 mm dicken austenitischen Wandung bei einer Fehlertiefe von 3 mm. Dies gilt sowohl fuer den homogenen Grundwerkstoff als auch fuer Schweissgefuege mit {delta}-Ferrit. (orig./MM)

  9. Editorial/Van die Redaksie

    African Journals Online (AJOL)

    deelnemende demokrasie', is dit belangrik om die oe oop te hou vir die wyse waarop dit die tradisionele patemalisme van geneeskundige praktyk" raak, veral as die behoeftes onderling grootliks verskil, en die prioriteite streeksverskille ...

  10. Die relevansie van die boek Prediker

    African Journals Online (AJOL)

    ook in die dogmatiek te bespeur is nie. 'n Vinnige oorsig oor die teksverwysings van. 'n paar wydgelese dogmatiekhandboeke kan dit bevestig. In Karl Barth se omvang- ryke Kirchliche Dogmatik word Prediker slegs vyf en dertig maal aangehaal en slegs sewe maal word teksgedeeltes bespreek. Emil Brunner haal Prediker ...

  11. DIE OUTESTAMENTIESE LEER AANGAANDE DIE MENS AS ...

    African Journals Online (AJOL)

    Test

    verdwyn s o o s rook". Meer voorbeetde gee die genoemde grammatikas. ') Hierdie opvatting van be vind ons bv. in die Leidsche Vertaling 1899, by JoH. H EH N , Zum TermiïiMS ,,BiM Qottes" in Festschrift Sachau, 1915, BÖ H L in TeÍMt en Uitieg,.

  12. Effect of the parameters of the feed system of advancing equipment on the rate of advance of a shield support; Einfluss der Parameter des Speisesystems einer Rueckvorrichtung auf die Rueckzeit eines Schildausbaus

    Energy Technology Data Exchange (ETDEWEB)

    Jaszczuk, M. [Technische Hochschule, Gleiwitz (Poland); Krodkiewski, J. [Forschungs- und Entwicklungszentrum fuer Elektrifizierung und Automatisierung im Bergbau (EMAG), Kattowitz (Poland)

    2008-09-18

    The results of an investigation into the effect of the feed system of an advancing cylinder on the follow-up process of the shield support to the face conveyor are described in the contribution. The research work was carried out with five support shields, the advancing cylinders of which were equipped with different flow resistances in the feed system. On the basis of the recorded time curves of the pushing force and the position of the shield support in relation to the conveyor the parameters of the probability distribution of the analysed quantities were determined and the position of the real operating points of the support (pushing force/time for the follow up) together with the operating characteristic curves of the pusher system for the individual configurations of the system recorded. (orig.)

  13. Die toepassing van die K3-model op die televisieteks Colour TV

    African Journals Online (AJOL)

    Die uitsaaier het ook geen klagtes van kykers ontvang oor die gebruik van die woord chlora nie. Inteendeel, op die sosiale netwerke Facebook en Twitter het kykers die gebruik van die woord verwelkom. Op Facebook skryf ʼn kyker (Howard 2011) die dag ná die eerste episode uitgesaai is: “Lol. Wow! Its amazing 2c how all ...

  14. Paradigmas en progressie in die teologie: *n Perspektief op die ...

    African Journals Online (AJOL)

    Met die ontdekking van kerne, atome, molekules en dies meer en die ontwik- keling van 'n mikro-fisika het die Newton-wette in die agtergrond geskuif. Daarmee saam het ook die sekuriteit wat dit gebring het, naamlik dat daar onder die oënskynlike chaos altyd 'n ordelike en konsekwente netwerk van wette en beginsels.

  15. P. J. N. Smal, Die Universalisme in die Psalms. Academisch ...

    African Journals Online (AJOL)

    Test

    dat die historiese element in Israel se Godsopenbaring en daarmee die insig in sy betekenis te kort gedoen word. Die betekenis van die studie vir die historia revelationis is daardeur gering; as duidelike „tydlose” sistematisering van Outestamentiese gegewens oor die betrokke onder- werpe, soos die laaste hoofstuk, bl.

  16. DIE APOSTOLAAT VAN DIE KERK IN HIERDIE TYD TEN OPSIGTE ...

    African Journals Online (AJOL)

    Test

    Hierdie verkondiging het net een doel en net een inhoud. Die doel ... is die vlees- geworde Woord, Christus. Die apostalaat is nie een funksie van die kerk tussen ander nie. Die kerk is apostel in alles wat hy is en doen. Die doel van die. 239 ... skawing, nie vir uitbreiding van politieke magssfere nie, ens. Selfs ten koste van ...

  17. Die bepaling van die 'sentrum van hoofbelange' by oorgrens ...

    African Journals Online (AJOL)

    As die filiaal se geregistreerde kantoor en die opvatting van derde partye op die selfde plek dui (sodat die vermoede in werking tree), moet die houermaatskappy meer, beter en swaarder getuienis aanvoer om die vermoede te weerlê. Die vermoede sal egter nie sonder meer weerlê word nie. 'n Essensiële en delikate ...

  18. DIE PLEK VAN SANG EN MUSIEK IN DIE PROTESTANTSE ...

    African Journals Online (AJOL)

    Test

    (a). In die behandeling van bostaande onderwerp, bevind ons ons op die gebied van die Praktiese Teologie. Die Praktiese Teologie het 'n merkwaardige tweeledige bestaan. Dit bestaan aan-die-een-kant sinvol as wetenskaplike besinning en spreke oor die „erediens”; dit bestaan aan-die-ander-kant óók sinvol.

  19. Die geskiedenis van die saw gedenkteken te Fort Klapperkop ...

    African Journals Online (AJOL)

    Die SAW Gedenkteken se lotgevalle is nou verbonde aan die van die. Militere Museum Fort Klapperkop aangesien die Gedenkteken op die terrein van Fort Klapperkop opgerig is. Weens rasionalisasie is die voortbestaan van Fort Klapperkop Museum onseker. Dit plaas ongetwyfeld dan ook 'n vraagteken agter die ...

  20. Die huwelik as identiteitsmerker in die Ou Testament

    African Journals Online (AJOL)

    p1243322

    formulier klem gelê op Genesis 2:22 se woorde dat God die vrou na die mens gebring het. Hieruit word net soos in die ..... die hoek van antropologiese teorie oor bloedverwantskap bestudeer. Sy rekonstrueer eers die sosiale ...... begrip wat vreemd is aan die pre-moderne denke rondom verwantskap. Tweedens is die.

  1. DIE ONTVC'ERP VAN 'N SENDINGBELEID IN DIE HUIDIGE ...

    African Journals Online (AJOL)

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    DIE ONTVC'ERP VAN 'N SENDINGBELEID IN DIE. HUIDIGE SITUASIE. Sending is 'n deel van die vervulling van die apostoliese opdrag van die kerk. Dit geskied op grond van en in gehoorsaamheid aan Gods. \\C'oord. Teologiese besinning is daarom die eerste en grondliggende vereiste by die ontwerp van 'n ...

  2. The hydrogen concentration as parameter to identify natural attenuation processes of volatile chlorinated hydrocarbons in ground water; Die Wasserstoffkonzentration als Parameter zur Identifizierung des natuerlichen Abbaus von leichtfluechtigen Chlorkohlenwasserstoffen (LCKW) im Grundwasser

    Energy Technology Data Exchange (ETDEWEB)

    Alter, M.D.

    2006-06-15

    In this study, the hydrogen concentration as parameter to identify natural attenuation processes of volatile chlorinated hydrocarbons was investigated. The currently accepted and recommended bubble strip method for hydrogen sampling was optimized, and a storage method for hydrogen samples was developed. Furthermore batch experiments with a dechlorinating mixed culture and pure cultures were carried out to study H{sub 2}-concentrations of competing redox processes. The extraction of hydrogen from ground water was optimized by a reduced inlet diameter of the usually applied gas sampling bulbs, allowing a maximal turbulent ow and gas transfer. With a gas volume of 10 ml and flow rates of 50 to 140 ml/min, the course of extraction almost followed the theoretical course of equilibration. At flow rates > 100 ml/min a equilibrium of 98% was achieved within 20 min. Until recently it was generally accepted that hydrogen samples can be stored only for 2 hours and therefore have to be analyzed immediately in the eld. Here, it was shown that eld samples can be stored for 1-3 days until analysis. For the dechlorination of tetrachloroethene (PCE), a hydrogen threshold concentration of 1-2 nM was found with the dechlorinating mixed culture as well as with a pure culture of Sulfurospirillum multivorans in combination with another pure culture Methanosarcina mazei. No dechlorination was detectable below this concentration. With the dechlorinating mixed culture, this finding is valid for all successive dechlorination steps until ethene. The hydrogen threshold concentration for denitrification were below the detection limit of 0,2 nM with the dechlorinating mixed culture. A threshold concentration of 3,1-3,5 nM was found for sulphate reduction and a threshold of 7-9 nM H{sub 2} for hydrogenotrophic methanogenesis. This implies that the natural dechlorination at contaminated sites is preferred to competing processes like sulphate reduction and methanogenesis. The threshold

  3. Wake up and Die

    DEFF Research Database (Denmark)

    Schubart, Rikke

    2013-01-01

    Anmeldelse af den colombianske gyserfilm Volver a morir (eng. titel Wake Up and Die) af Miguel Urrutia......Anmeldelse af den colombianske gyserfilm Volver a morir (eng. titel Wake Up and Die) af Miguel Urrutia...

  4. Die wonder van Afrikaans

    Directory of Open Access Journals (Sweden)

    H. Venter

    1959-03-01

    Full Text Available In die Januarie-Februarie-uitgawe van Koers het die hoofredakteur daarop gewys dat 1959 ’n gedenkjaar is, en onde randere ook vermeld dat dit die jaar is van die goue jubileum van die Suid-Afrikaanse Akademie vir Wetenskap en Kuns (gestig op 2 Julie 1909. Daarby moet ons nie vergeet dat die P.A.K. (gestig19 Desember 1929 in hierdie jaar sy dertigste bestaansjaar voltooi nie. Dit is dan ook heeltemal gepas dat ons in hierdie gedenkjaar, op versoek van hierdie twee liggame wat so ontsaglik baie gedoen het vir die handhaaf en bou van ons taal, ons aandag sal saamtrek rondom die wonder van Afrikaans.

  5. Die Koalitionsvereinbarungen zur Energiewende

    National Research Council Canada - National Science Library

    2014-01-01

    .... Die zunachst so erfolgreich gestartete Energiewende ist ins Stolpern geraten. Das europaische Zertifikatesystem, das Erneuerbare-Energien-Gesetz und die Energiewende mussen nun vor allem kosteneffizient neu justiert werden...

  6. Die Virtuelle Fachbibliothek Psychologie

    OpenAIRE

    Magyar, Natascha

    2002-01-01

    'Der Benutzer soll zukünftig in der Lage sein, sich mit seinem Informationswunsch an eine fachliche Organisationseinheit - die Virtuelle Fachbibliothek - wenden zu können, in der die Nachweisfunktion, die Zuordnung und die Vermittlung fachlicher Informationen in gedruckter und elektronischer Form organisatorisch vorbereitet und in der Durchführung kooperativ sichergestellt sind. (Rutz, Reinhard: SSG-Programm, Virtuelle Fachbibliotheken und das Förderkonzept der DFG. Bonn, 1997). Um diesem Sze...

  7. Die Tempelrolle und die Struktureigenschaften des Kollagens

    OpenAIRE

    Schütz, Roman

    2016-01-01

    Die „Schriftrollen vom Toten Meer“ stoßen seit ihrer Entdeckung Mitte des letzten Jahrhunderts bei den Religionshistorikern und in der breiten Öffentlichkeit auf großes Interesse. Sie stammen aus der Zeit der Zweiten Tempelperiode - der Wiege des Christentums und dem Vorabend der Zerstörung des Tempels von Jerusalem durch die Römer. Diese Ereignisse haben den weiteren Verlauf der Menschheitsgeschichte entscheidend mitgeprägt. Dem Text der Rollen hat die Forschung sehr viel Aufmerksamkeit ...

  8. Verslikking in die Richardsbaainatuurreservaat, Natal

    Directory of Open Access Journals (Sweden)

    J. Cooks

    1986-03-01

    Full Text Available ’n Ondersoek na die redes en tempo van verslikking in die Richardsbaaise Natuurreservaat dui daarop dat versnelde verslikking in die reservaat die gevolg is van ’n versteuring van die natuurlike ekwilibrium deur menslike aktiwiteite tydens die ontwikkeling van die hawe. Die belangrikste redes is waarskynlik die konstruksie van ’n dyk wat die estuarium verdeel, die oopmaak van ’n nuwe monding en boerderywanpraktyke in die opvanggebied. Die tempo van verslikking het in so ’n mate toegeneem dat ongeveer 36,14 persent van die natuurreservaat reeds gedurende die eerste 11 jaar toegeslik het. ’n Projeksie van hierdie verslikkingstempo dui daarop dat die reservaat binne die bestek van ongeveer 29 jaar heeltemal sal toeslik. ’n Dramatiese toename in die plantaanwas toon dieselfde neiging.

  9. DIE OPTIMUM INSLUITINGSPEIL VAN ...

    African Journals Online (AJOL)

    Aan elkeen is een van die 35 diete ewekansig toegese. Elke vark het ad lib toegang gehad tot die dieet vanaf 8 weke ouderdom tot op 'n lewende massa van ongeveer 50 kg. Die varke is afsonderlik in hokkies van ongeveer 1,5 m X 1 m, toegerus met selfvoerders en drinktepels, aangehou. Voerinname en lewende massa.

  10. Die humanistiese mensbeeld

    African Journals Online (AJOL)

    Liberalisme-kapitalisme vanuit die denke van Adam Smith (1723-. 1790), demokratiese-sosialisme vanuit die denke van Jean Jacques Rousseau (1712-. 1778), en Marxisme-kommunisme vanuit die denke van Karl Marx (1818-1883). In elkeen van hierdie ideologiese strominge bestaan 'n mensbeeld soos dit bepaal.

  11. Die Plattform Medienbiografie

    OpenAIRE

    Christian Nosko

    2013-01-01

    Wenn die eigene Medienbiografie Nutzungsmuster und Einstellungen gegenüber Medien in hohem Maß beeinflusst, dann stellt die Beschäftigung damit in der Aus-, Fort- und Weiterbildung von LehrerInnen ein unumgängliches Element dar. Christian Nosko präsentiert die Plattform "Medienbiografie".

  12. Die Gattungen der Myriangiales

    NARCIS (Netherlands)

    Arx, von J.A.

    1963-01-01

    Die Myriangiales sind ascoloculäre Ascomyceten mit bitunicaten Asci und lassen sich durch Zwischenformen mit den Dothiorales verbinden. Bei ihnen entstehen die Asci im Innern von Fruchtkörpern einzeln zerstreut und sind kugelig oder breit keulig. Die 21 anerkannten Gattungen werden schlüsselförmig

  13. DIE GELOFTEKERK. Woorc/ ^oora/.

    African Journals Online (AJOL)

    Test

    die gelofte kerk sou gereserveer het, aan die kerkraad van die Ned. Geref. Gemeente aldaar te ... Ms. ]2: John Bird: The Annats of Nata], Vo!. I, pr. 445. ... Zn. P.M.. Burg 1865. f yierdie vandag baie seldsame brosjure is in 1865 deur ds. P. Huet.

  14. Die gebruik van parallelplaatreologie vir die bepaling van die intrinsieke viskositeit van poli-etileentereftalaat

    Directory of Open Access Journals (Sweden)

    O. C. Vorster

    2005-09-01

    Full Text Available Die bepaling van die intrinsieke viskositeit van poli-etileentereftalaat word bemoeilik deur die feit dat daar tans slegs twee metodes in gebruik is. In die eerste metode word die bepaling deur middel van oplossingsviskometrie gedoen, maar die toksisiteit van die oplosmiddel, asook die tydperk wat dit neem om die bepaling te doen, is ’n probleem. Die tweede metode word beperk deur die kompleksiteit en beskikbaarheid van die apparatuur in Suid-Afrika. In hierdie studie word ’n alternatiewe metode, gebaseer op parallelplaatreologie, voorgestel wat albei hierdie probleme oorkom en die resultate sodoende verkry, word vergelyk met dié wat met bestaande metodes verkry is.

  15. Device to feed purging and degraphitization air into the rich gas pipes leading to the individual heating walls of coke ovens. Einrichtung zur Zufuehrung von Spuel- und Entgraphitierungsluft in die zu den einzelnen Heizwaenden von Verkokungsoefen fuehrenden Starkgasleitungen

    Energy Technology Data Exchange (ETDEWEB)

    Kueppenbender, R.

    1982-03-25

    A device to feed purging and degraphitization air into the rich gas pipes leading to the individual heating walls of coke ovens is described. Two inlet cross-sections, lockable with covers, are provided for the purging and degraphitization air. The two covers are connected by chains or a rod. The cover of the degraphitization air is opened with respect to the cover of the purging air after a time lag.

  16. Die onstuitbare gang van die wetenskap

    Directory of Open Access Journals (Sweden)

    Editorial Office

    2001-09-01

    Full Text Available Ten einde nie in té vae algemeenhede te verval nie, sal skrywervan hierdie standpunt hom beperk tot die natuurwetenskap, endan slegs tot enkele terreine binne hierdie bepaalde gebied.

  17. Die Onderwys en Opvoeding van die Afrikaner in die Twintigste Eeu (I.

    Directory of Open Access Journals (Sweden)

    J. C. Coetzee

    1951-03-01

    Full Text Available Die twintigste eeu het vir die Afrikaner waar hy ook in Suid-Afrika woonagtig was, baie donker aangebreek: In die loop van 1900 is die twee Boere-Republieke beset en al het die worstelstryd van die Boeremagte nog tot in 1902 voortgeduur, was die einde vanaf 1900 reeds beslis.

  18. Verskuiwing in die moraal?

    Directory of Open Access Journals (Sweden)

    S.P. van der Walt

    1974-03-01

    Full Text Available Modewoorde het ons deesdae oorgenoeg in die Christelike sedeleer en hulle kan nogal verwarring stig. U moet my vergun om met u te spreek oor een so ’n modewoord nl „verskuiwing’’ in die moraal. Dis nogal ’n mooi woord, wat so dikwels gebruik word op baie terreine en tog meer wil aandui as maar net ’n veranderde sienswyse, ’n wysiging in opvattinge of nuwe riglyne wat al gangbaar geword het in die praktyk. Die begrip wil eintlik die ewolusionêre gang beklemtoon, want dit is dan eintlik net die ou norme wat effens anders bekyk word of nie meer so nou geneem of dik onderstreep word nie. Die verskuiwing beteken dan dat alles nog dieselfde bly, net die posisie of plek het verander. Verskuiwing beteken tog plekverandering of plekwisseling en dan sekerlik nie in die sin dat die plekke ver uitmekaar lê nie. Verskuiwing beteken net maar vlak langs die vorige te staan kom. As dit dan ’n beter plek is, is dit ewolusie, ontwikkeling, verbetering.

  19. Die Voortrekker-ideale in die moderne wêreld

    Directory of Open Access Journals (Sweden)

    L. J. du Plessis

    1938-03-01

    Full Text Available Terwyl ons nou die Groot Trek op die eeu-tyd weer belewe, is dit seker gepas om die vraag te stel in hoever daar in die moderne wêreld en ons hedendaagse Suid-Afrika nog plek is vir en lewenskrag is in die Voortrekker-ideale: naamlik om op die Afrikaanse hoogland die Christelike beskawing te vestig volgens suiwer Afrikaanse styl in ’n eie republikeinse staatsverband met voogdy oor die gekleurde bevolking sonder gelykstelling.

  20. DIE ONSTERFLIKHEID VAN DIE MENSLIKE SIEL') Daar is geen ...

    African Journals Online (AJOL)

    Test

    harde stemme : „Heil aan onse God wat op die troon sit, en aan die Lam." Hulle het uit die groot verdrukking gekom, en hulle leef voor Gods troon en het dus nie met die dood van die liggame ook gesterf nie. Ons kan dan ook nie anders sê nie as dat iedereen wat die onsterf likheid van die siel loën, met die Heilige Skrif en ...

  1. Die hervertolking van die paradigma in verband met die ...

    African Journals Online (AJOL)

    Akade- mie Drukker. Rutgers, F L 1882. Hel kerkverband der Nederlandsch Gereformeerde Kerken. Am sterdam. Schlaich, K 1969. Kollegialtlieorie: Kirche, Recht und Stoat in der Aufklaning. Jus ec- clesiasticum, Bd 8. Miinchen. Scholtz, G D sj. Geskiedenis van die Nederduitse Hervormde of Gereformeerde Kerk. Pretoria.

  2. 'n Begronde bedieningsmodel vir die diakonia van die gemeente

    African Journals Online (AJOL)

    15 Feb 2012 ... 'n model (Pastoral Family Model) (2008:235–237). Hy gee ook belangrike aspekte van die toepassing van die model weer (2008:244–247), maar .... geleenthede is gereël waar lidmate die sinodebesluite kon bespreek, asook die rigting waarin die kerkraad dink met die oog op 'n nuwe bedieningsmodel.

  3. PS Dreyer: Bakens op die pad van die wetenskap

    African Journals Online (AJOL)

    Historia 3/1. 15. Die grondslae van die Westerse leefwyse, in Cronjé, G (red) 1963,. Die Westerse kultuur in Suid-Afrika. Pretoria: Van Schaik. 16. Van mite tot wetenskap, in Cronjé, G (red) 1966, Kultuurbeïnvloe- ding in die oudheid. Pretoria: Van Schaik. (Fakulteitslesings). 17. Die wysgerige Antropologie en die Teologie, ...

  4. oor die teologiese inhoud van die belydenis van belhar1

    African Journals Online (AJOL)

    31 Okt 2011 ... Die sigbare eenheid sluit 'n ryke en wonderbare verskeidenheid in, nie uit nie – dis die eerste punt. Om dié oortuiging te verwoord word 'n lang lys van assosiasies gebruik, vanuit die Bybel en die belydenisskrifte, om gelowiges te herinner aan hoe ryk en kompleks die geleefde eenheid, die onderlinge ...

  5. die doel en wese van opvoedende onderwys en die implikasies ...

    African Journals Online (AJOL)

    kan word is waardevol vir die ontwikkeling en voortbestaan van die rnens. :1et die verworwe kenni s van die mens kan hy vaardighede aanleer (fisiese en psigiese). Die mens moet hom dus '' ... in die w~reld orii:!nteer •.. " volgens Harmse (1979, b1.26). Hierdie orientasie kan noodwendig nie doeltreffend plaasvind indien 'n ...

  6. Die mens as sondaar - Die beskouing van Karl Barth

    African Journals Online (AJOL)

    Satan en die Antichris gebring is. Daar was egter ook enkeles wat daarin 'n welkome nuwe geluid gehoor het met klanke wat herinner het aan die reformatoriese godgeleerdiieid. So is die nuwe gedagtes verder gedra en het dit geleidelik ver en wyd in die kerklike wêreld weerklank gevind. In die voorwoord tot die eerste ...

  7. Author: T Bekker DIE MOONTLIKE REGSHERVORMING VAN DIE ...

    African Journals Online (AJOL)

    RV

    written contract.17. Die gemelde bedoeling van die partye word vasgestel vanuit die dokument self, maar ook vanuit die woorde en gedrag van die partye en die ..... common intention or oral agreement, and it was that mistake in their written ... evidence rule, but in principle there seems no difference between a common.

  8. DIE HEDENDAAGSE SIENING VAN DIE NORMERING VAN DUITS ...

    African Journals Online (AJOL)

    die Duitse taal (vergelyk Deutsche Sprache 1983:382 en later), terminologie soos gebruiklik in die Duitse ..... met die bylae Sprachpraxis, asook 'n handboek met die titel Deutsch - eln Lehrbuch Eur Auslander (Duits ... en die los- en vasskryE van woorde (Duden-Grammatik ^1984:67). Die strewe na 'n ooreenkoms oor ...

  9. Influence of heat transfer on walls due to aerosol decomposition rate in the containment building of nuclear power plants during heavy incidents; Einfluss des Waermeuebergangs an Waenden auf die Aerosolabbaurate im Sicherheitsbehaelter von Kernkraftwerken bei schweren Stoerfaellen

    Energy Technology Data Exchange (ETDEWEB)

    Braun, T.

    2004-07-01

    Today, German nuclear power plants are leading in safety standards worldwide. Increasing potentials arise continuously along with improvements in technology. One of these potentials is the best-estimate simulation of fission product transport in case of a severe accident. A main part of the fission products is allocated on aerosols. Therefore, the aerosol behavior before containment leakage is important for the radioactive source term to the environment. Having a good knowledge about the main aerosol phenomena, it is possible to simulate them numerically. This enables to develop and test safety measures to limit damages before accidents occur. Within this study, the main aerosol phenomena have been ascertained and accordingly classified into formation, transport and reduction. On this basis, simulations of one- and multi-component aerosol experiments of the KAEVER series have been performed with the COCOSYS code. Due to an overprediction of the computed volume condensation rate, the results showed an overestimation of the reduction rate of insoluble aerosols. The reason was found to be the underestimation of the wall condensation rate. Based on an additional plain thermal hydraulic multi compartment experiment, these uncertainties in the wall heat transfer correlations were investigated in detail. The results show a strong dependency between the wall condensation rate and the convective heat transfer, resp. the characteristic length. In case of mainly forced convection, correct values for the characteristic length led to an underestimation of the calculated heat transfer coefficients. The analysis of the heat transfer models show an inconsistency in the coupling of free and forced convection. Therefore, an improved and consistent convection model has been developed and implemented. Both models have been tested on different experiments. Although the new model shows only minor improvements, it could be proven that the influence for forced convection is significant

  10. Die meganies-fisiese eienskappe van die trabekulêre (kanselleuse been van die femurnek

    Directory of Open Access Journals (Sweden)

    D. H. van Papendorp

    1986-03-01

    Full Text Available Die drukspanning wat nodig is om die trabekulere been van die femurnek, by pasiente met femurnekfrakture, te laat swig, is 60% minder as die wat nodig is om dieselfde resultaat by pasiente met heuposteoartrose te verkry. Die kompressiesterkte van die trabekulere been toon ’n redelike korrelasie (r = 0,58 met die relatiewe digtheid van die been, ’n Analise van die helling van die spanning-vervormingkurwes en ’n bepaling van die elastisiteitsmodulus van die trabekulere been toon dat pasiente met femurnekfrakture se been 30 - 60% meer elasties is as die van pasiente met heuposteoartrose. Sowel die sterkte as die elastisiteit van die trabekulere been kan dus ’n rol in die evolusie van fermurnekfrakture speel.

  11. Openbaring, teologie en die regswetenskap

    Directory of Open Access Journals (Sweden)

    S. Postma

    1970-03-01

    Full Text Available In die jongste tyd is telkens en weer gewaarsku teen die gevare van oorspesialisasie en die hipertrofie van professionalisme. Die gemis aan ’n totaliteitsvisie wat hiermee gepaard gaan, word dan ook tereg teengegaan en wel deur aan die Wysbegeerte as die Wetenskap van die totaliteit van die kosmos in toenemende mate sy regmatige plek as wetenskapsintegreerder te gun. Hierdie grootmoedige gun van ’n plek in die son van geleerdheid kan egter ook uit bedenklike motiewe plaasvind. Die vakwetenskaplike kan nie of wil nie die plek en betekenis van sy spesifieke vak bepaal en bepeins nie en vind dit in elk geval moeilik om die verband tussen Gods Woord en sy besondere vak in duidelike perspektief te sien; vandaar dan ’n grootmoedige toelaat dat die wysbegeerte die „veritas” dien terwyl die eie ek tevrede is om die „utilitas” onderdanig te wees.

  12. Die tug oor ampsdraers tydens die doleansie van 1886

    Directory of Open Access Journals (Sweden)

    J. Visser

    1986-06-01

    Full Text Available In art 29 van die Nederlandse Geloofsbelydenis word bely: “Die merktekens om die ware Kerk te ken is die volgende: As die Kerk die suiwere prediking van die evangelie uitoefen, as dit die suiwer bediening van die sakramente gebruik soos Christus dit ingestel het, as die kerklike tug gebruik word om die sondes te straf.” Dit spreek vanself dat wanneer ampsdraers, aan wie Christus sy kudde toevertrou het (Hand 20 : 28, met leer en /of lewenswandel in sonde volhard en nie daarin met tug gestuit word nie, word die ware kerk nie gebou nie maar afgebreek. 0ns sal later in hierdie artikel aantoon hoedanig die suiwer tug oor ampsdraers, veral leertug, tydens die Doleansie tot skade van die kerk van Christus agterweë gebly het.

  13. Die historiese Jesus as wondenverker

    African Journals Online (AJOL)

    vierde en vyfde eeu dateer. Die Christelike magie-papiri in die versameling kom hoofsaaklik uit die vyfde en sesde eeu. In die nie-Christelike magie-papiri hang die effektiwiteit af van die veelvuldige goddelike name wat aangeroep word: Adonai, lao. Psyche, Eros, Osiris, Isis, Anubis, Re, Hermes, Zeus, Helios, Selene, Kore ...

  14. Optimization of Composition and Heat Treating of Die Steels for Extended Lifetime

    Energy Technology Data Exchange (ETDEWEB)

    David Schwam; John F. Wallace; Quanyou Zhou

    2002-01-30

    An ''average'' die casting die costs fifty thousand dollars. A die used in making die cast aluminum engine blocks can cost well over one million dollars. These costs provide a strong incentive for extension of die life. While vacuum quenched Premium Grade H13 dies have become the most widely used in the United States, tool makers and die casters are constantly searching for new steels and heat treating procedures to extend die life. This project was undertaken to investigate the effects of composition and heat treating on die life and optimize these parameters.

  15. Ontsporing van die regstaatsbegrip en sy konsekwensies vir die afrikanervolk

    Directory of Open Access Journals (Sweden)

    N. G.S. Van der Walt

    1966-03-01

    Full Text Available Die opvatting van die suiwere regstaat bring sy vraagstukke mee wanneer dit in verband gebring word met die leer van die soewereiniteit in eie kring. Laasgenoemde leer wortel in die geloof dat God die mens roep tot diens aan Hom, en dat die mens vry moet wees om ten opsigte van alle lewensaspekte God na die hoogste mate te kan dien. Hierdie verskeidenheid van aspekte is deur dr. A. Kuyper en sy volgelinge gesistemati- seer tot menslike verbande en lewenskringe, elk met ’n be- paalde sfeer waarin ander kringe nie mag inmeng nie. Elkeen is dan soewerein binne sy eie kring. Met verwysing na die staat is dan gespreek van die staatstaak as synde die hand- hawing van die reg, en omdat die staat in toenemende mate hom veral in die latere tyd ook besig gehou het met bedrywig- hede wat nouliks as van juridiese aard beskou kan word, is daar die onderskeid gemaak tussen die primêre en sekundêre taak van die staat. Die sistematiek van die wetsidee, deur prof. Dooyeweerd ontwikkel, waar die staat sy bestemmingsfunksie in die regsaspek vind, het vanselfsprekend geen plek vir so 'n dualistiese staatstaak nie, en die oplossing is deur sommige daarin gesoek om sulke staatsoptrede te vertolk as hebbende wel betrekking op die regsgemeenskap of die regsverkeer. Staatsondernemings soos paaie, spoorweë, spellingreëling, ens. word dan beskou as noodsaaklik vir die instandhouding van die regsgemeenskap en regsverkeer. Tereg wys A. M. Donner1 daarop dat so ’n vertolking eintlik neerkom op ’n oorspanning van die regsbegrip. Hy self sien dan die staatstaak in vrede- of orde-handhawing, wat in die eerste plaas wel regshandha- wing veronderstel. Onder orde word dan alles verstaan wat noodsaaklik is vir die gladde verkeer in die ontwikkelingsgang van die regsgemeenskap. Die wese van die staat het dan vol- gens hom te doen met reg, maar sy taak is meer as suiwere regshandhawing. Wat onrus verwek en die orde versteur, moet uit die openbare lewe verwyder word, en die

  16. DIE GELOFTEKERK. Woorc/ ^oora/.

    African Journals Online (AJOL)

    Test

    mus Smit dit in haar dagboek noem, en wat deur Landdros J. P.. Zietsman in n brief aan die Volksraad op 31 ... Daarom het landdros J. P. Zietsman op 28 Maart 1840 aan die Volksraad as volg geskryf^):. W elEdele .... The Diary of Dr. Andrew Smith 1834-1836 (V.R.S. 20). bis. 149, waar die skrywer verhaal hoe hy op 30 ...

  17. Die Problematik des Pauschalurteils

    OpenAIRE

    Hansen, Klaus P.

    2009-01-01

    Klaus P. Hansen betont in seinem Beitrag über die "Problematik des Pauschalurteils", dass sich Verallgemeinerungen über ein Kollektiv nur auf die partiellen Gemeinsamkeiten dieser Gruppe, nicht aber auf Individuen beziehen dürfen. Der Kulturtheoretiker erinnert an die menschliche Multikollektivität, plädiert für eine dichte Zuschreibung beobachteter Merkmale zu einzelnen Gruppenmitgliedschaften und entwirft eine Typologie unterschiedlicher Kollektivformen. Nationen konzipiert er als Dachkolle...

  18. Analise van die Tswanaraaisel

    Directory of Open Access Journals (Sweden)

    S. A. Swanepoel

    1984-05-01

    Full Text Available ’n Strukturele, stilistiese en funksionele bcskrywing van die Twanaraaisel bring mee dat daar aan die volgende aspekte aandag gegee moet word: •\tWat is ’n raaisel en lioe word dit in Tswana genoem. •\tTot watter studiegebied en literere genre hoort die raaisel en watter subvorme kan vir Tswana onderskei word. •\tHoe sien die struktuur van Tswanaraaisels daar uit. •\tDeur wie, waar, wanneer en hoe word Tswanaraaisels voorgedra. •\tWatter stilistiese kenmcrke kan in Tswanaraaisels onderskei word. •\tWatter funksies vervul raaisels in ’n Tswanagcmeenskap.

  19. Die brein soos beskou deur die Grieke en Romeine

    Directory of Open Access Journals (Sweden)

    Francois P. Retief

    2015-02-01

    Full Text Available In Ou Egipte is mummifikasie met uitgebreide reseksie of uitsnyding van organe geassosieer, maar geen kennis is geneem van die morfologie van die brein nie. Griekse skrywers van die sesde en vyfde eeue v.C. het die brein aanvanklik gesien as die setel van intelligensie, die orgaan van sensoriese waarneming en gedeeltelik die oorsprong van sperma. Pneuma het ’n belangrike rol in breinfunksie gespeel. Hippokrates was die eerste om die brein te beskryf as ’n dubbele orgaan, wat met harsingvlies (meninges bedek, funksioneel van pneuma afhanklik en vertolker van begrip is. Tydgenote soos Plato, Aristoteles en Diokles het tot die beskrywing bygedra, maar laasgenoemde twee het beweer dat die hart die middelpunt van intelligensie is en nie die brein nie. Gedurende die laaste helfte van die vierde eeu v.C. is disseksie van die menslike liggaam tydelik aan die mediese skool van Alexandrië toegelaat en het dit tot merkwaardige vooruitgang in die begrip van die menslike anatomie en fisiologie gelei. Herofilus en Erasistratus het uitstekende beskrywings van die struktuur en funksie van die brein gegee wat eers in die tweede eeu n.C. deur Galenus geëwenaar is.

  20. Die Afrikaanse volkskultuur en die nuwe wêreld

    Directory of Open Access Journals (Sweden)

    J.H. Coetzee

    1970-03-01

    Full Text Available Die opskrif dwing die referent om te opereer met twee begrippe wat deur hulle kompleksiteit en onbelyndheid uiters moeilik bepaalbaar en hanteerbaar is. Alhoewel sommige strominge in die moderne Volkekunde die reg van hierdie wetenskap erken om alle volkskulture, ook dié van die moderne volke te bestudeer, het weinig skrywers hulle energie en vaardigheid in hierdie rigting gewaag. Dit is trouens juis die begrensdheid, homogeniteit en betreklike eenvoud van die primitiewe volkskulture wat die beoefenaars van die vak in die praktyk gedwing en verlei het om hulle aandag feitlik uitsluitend op sodanige kultuurstudies toe te spits. Die studie van die grotere en moderne volke is links gelaat aangesien die getalsterkte, interne verskeidenheid en snelle veranderinge byna onoorkoomlike eise aan die navorser stel.

  1. Optimalisering van die omskakeling van matrieksimbole vir ...

    African Journals Online (AJOL)

    Erna Kinsey

    die gevolglike matrieksimboolpunttotaal (MST) aangetref. Die geldig- heid van matriekprestasie as voorspeller van universiteitsprestasie word dan gewoonlik ondersoek deur die MST met die gemiddelde van die persentasiepunte oor die gekose universiteitsvakke in die eerste akademiese semester of jaar te korreleer.

  2. Die rol van die US se Departement Afrikaans en Nederlands in die ...

    African Journals Online (AJOL)

    user

    Opsomming: Hierdie artikel stel ondersoek in na die rol van die Universiteit Stellenbosch se. Departement Afrikaans en Nederlands in die ontwikkeling van die Afrikaanse leksikografie deur hulle betrokkenheid by twee verklarende standaardwoordeboeke, te wete die Verklarende Hand- woordeboek van die Afrikaanse ...

  3. die pers as bron oor die geskiedenis van die eerste vrydeidsoorlog

    African Journals Online (AJOL)

    Hy was in die kamp by kaptein Roberts toe van die soldate wat teruggeval het, by die kamp aangekom het. Kaptein Roberts het die soldate nog ammunisie aangebied wat die soldate van die hand gewys het daar hulle nag genoeg rondtes gehad het. ... De Express, De Vriend van de Souwereiniteit en. Bloemfonteinsche.

  4. A. Selms DIE TEOLOGIE VAN DIE WOORD EN DIE FIGUUR VAN ...

    African Journals Online (AJOL)

    Test

    deur Thomas Aquinas. Onder invloed van Augustinus vind ons by. Thomas eweeens 'n sterk beklemtoning van die genade, en sien hy die verhouding tussen God en mens van God af bepaal, maar die terminologie waarmee hy uitdrukking gee aan sy opvatting is die van die Axistoteliese metafisika, en met die terminologie ...

  5. Modelle van interreligieuse toleransie in die onderwys van die een-en-twintigste eeu

    Directory of Open Access Journals (Sweden)

    Charste C. Wolhuter

    2014-11-01

    Full Text Available Vir ’n toenemend multireligieuse samelewing en globaliserende wêreld behoort die opvoedeling, net soos in die verlede, voorberei te word vir saamleef met mense wie se religieuse oortuigings anders is as hulle eie. Die doel van hierdie artikel is om die belangrikste modelle van interreligieuse toleransie in terme van hulle bruikbaarheid in die onderwys te evalueer. Hierdie evaluering geskied aan die hand van die volgende maatstawwe: die struktuur en aard van religie en die plek daarvan in die lewe van die mens; die aard, doelstellings en reikwydte van onderwys; die toenemende diverse samestelling van samelewings; en die kontemporêre samelewingstendense van toenemende individualisering en pluralisering. Die hoofmodelle van interreligieuse verhoudings, naamlik eksklusivisme (sowel die sendingywer- as die laissez faire-variasies, inklusivisme, universalisme en ook die verskillende vorms van pluralisme, insluitende positiewe of dialogiese pluralisme, word aan hierdie maatstawwe gemeet. Op grond van die tekortkomings van hierdie modelle word ’n nuwe model, te wete ’n lewensbeskoulik(e saamleef, vervolgens ontwikkel en voorgestel. Models of interreligious tolerance for education in the 21st century. For an increasingly multi-religious society and globalised world, the educand should also be prepared for living with people who embrace religious beliefs that may differ from their own. The aim of this article is to evaluate the various models of interreligious tolerance in terms of their usefulness in education. This assessment takes place according to the following parameters: the nature and structure of religion and the place thereof in the lives of people; the increasingly diverse composition of societies; the contemporary societal trends of growing individualisation and pluralisation, and also the nature, aims and extent of education. The major models of interreligious relations are weighed up against these criteria, namely

  6. Modelle van interreligieuse toleransie in die onderwys van die een-en-twintigste eeu

    Directory of Open Access Journals (Sweden)

    Charste C. Wolhuter

    2014-03-01

    Full Text Available Vir ’n toenemend multireligieuse samelewing en globaliserende wêreld behoort die opvoedeling, net soos in die verlede, voorberei te word vir saamleef met mense wie se religieuse oortuigings anders is as hulle eie. Die doel van hierdie artikel is om die belangrikste modelle van interreligieuse toleransie in terme van hulle bruikbaarheid in die onderwys te evalueer. Hierdie evaluering geskied aan die hand van die volgende maatstawwe: die struktuur en aard van religie en die plek daarvan in die lewe van die mens; die aard, doelstellings en reikwydte van onderwys; die toenemende diverse samestelling van samelewings; en die kontemporêre samelewingstendense van toenemende individualisering en pluralisering. Die hoofmodelle van interreligieuse verhoudings, naamlik eksklusivisme (sowel die sendingywer- as die laissez faire-variasies, inklusivisme, universalisme en ook die verskillende vorms van pluralisme, insluitende positiewe of dialogiese pluralisme, word aan hierdie maatstawwe gemeet. Op grond van die tekortkomings van hierdie modelle word ’n nuwe model, te wete ’n lewensbeskoulik(e saamleef, vervolgens ontwikkel en voorgestel.Models of interreligious tolerance for education in the 21st century. For an increasingly multi-religious society and globalised world, the educand should also be prepared for living with people who embrace religious beliefs that may differ from their own. The aim of this article is to evaluate the various models of interreligious tolerance in terms of their usefulness in education. This assessment takes place according to the following parameters: the nature and structure of religion and the place thereof in the lives of people; the increasingly diverse composition of societies; the contemporary societal trends of growing individualisation and pluralisation, and also the nature, aims and extent of education. The major models of interreligious relations are weighed up against these criteria, namely

  7. Die invloed van liggaamsparameters op die reproduksieprestasie ...

    African Journals Online (AJOL)

    Body size (wither height, wither to ischium length, chest width, depth and circumference) was determined at the commencement of the .... Ooie in die drie groepe is in groepe gevoer teen verskillende voedingspeile oor 'n ..... ovulation rate and wool growth responses of light and heavy ewes to differential feeding. N. Z. J.

  8. DIE PROBLEMATIEK IN DIE NAVORSING VAN KONTEMPORERE ...

    African Journals Online (AJOL)

    10 Okt 1992 ... lematic. The writer suggeststhat a general amnesty for soldiers, increased flexibility with regard to security and the closer .... van sekere tipes bronne. PROBLEMA TIEK. BEKOMBAARHEID. VAN DOKUMENTE. Aile dokumente wat deur die staats- diens gebruik word isargiewe. Volgens wet word dokumente.

  9. Die Amphibien und Reptilien

    OpenAIRE

    Braumann, Fred

    2014-01-01

    Obgleich die Zeiten, "... in denen der einsame Wanderer von Adter (Otter) Geziesche erschreckte ... " seit Riedel nunmehr 200 Jahre zurückliegen, weist der Drömling heute mit 13 Amphibien- und 4 Reptilienarten noch eine relativ reiche Herpetofauna auf. Besonders die individuenreichen Populationen der Rote Liste-Arten Kreuzkröte, Laubfrosch und Ringelnatter besitzen dabei landesweite Bedeutung.

  10. calvyn oor die leiding van die heilige gees in die verklaring van die ...

    African Journals Online (AJOL)

    seellant et imprimans les promesses de salut en noz cueurs.5. 4 Bedienaar: Ontvang ons geloof uit onsself, of ontvang ons dit van God? Kind: Die. Skrif leer dat dit 'n besondere gawe van God is, en ervaring bevestig dit (CO 6,45). 5 Bedienaar: Wat bedoel jy daarmee? Kind: Ons begrip is te verdorwe om die geeste-.

  11. Die Bilder zum Text

    OpenAIRE

    Loesch, Perk

    2007-01-01

    Die ebenso glückliche, wie schöne und wertvolle Erwerbung einer Handschrift von Wilhelm Dilich (1571/72-1650) für die Handschriftensammlung der SLUB gibt Veranlassung, nicht allein diese Handschrift vorzustellen, sondern auch an ihren Verfasser zu erinnern, dessen Wirken gleichermaßen mit Hessen und Sachsen verbunden ist.

  12. Die woord vra kontak

    African Journals Online (AJOL)

    need for general recognition of the interdisciplinary nature of modem lexico- graphical work and for a genuine will to cooperate.''! Vir sover hierdie same- werking implikasiesinhou vir die leksikografiese bedryf, moet dit aanbod kom in die AFRILEX-reeks. R.R.K. Hartmann, daardie produktiewe en goed ingeligte skrywer en.

  13. GODSBEELDE IN DIE LITURGIE

    African Journals Online (AJOL)

    15 Mei 2010 ... 283−301, JCB Mohr,. Tübingen. Strydom, W.M.L., 1994, Liturgie en lied: 'Sing Nuwe Sange,. Nuutgebore', NG Sendingpers, Bloemfontein. Van Heerden, E., 1987, Amulet teen die vuur, Tafelberg, Kaapstad. Vos, C.J.A., 1995, Die blye tyding, RGN Uitgewers, Pretoria. Vos, C.J.A., 2005, Theopoetry of the ...

  14. Die entwicklung, die metamorphose, die entstehung: Die konzepte des organismus von Aristoteles bis Darwin

    Directory of Open Access Journals (Sweden)

    Kamerer Eva

    2009-01-01

    Full Text Available (nemački In diesem Aufsatz versuche ich, die Elemente verschiedener Konzepte des Organismus in der Philosophie und in der Wissenschaft zu analysieren. Die Deutungen des Organismus und der Einheit der Natur bei Aristoteles, Kant und Goethe werden als ein Beispiel der Bewegung von einem finalistischen zum antifinalistischen Bild der Natur verstanden.

  15. Latyn en die eenheid en verskeidenheid van die romaanse tale

    Directory of Open Access Journals (Sweden)

    M. J.H. du Plessis

    1985-05-01

    Full Text Available Met die afsterwe van die biskop van Avignon in 561 het die koning van die Franke, Clotharius die eerste, die vakante pos aan ’n Paryse priester aangebied. Laasgenoemde het die aanbod egter vriendelik maar ferm van die hand gewys. As rede het hy sy onkunde en veral sy gebrekkige kennis van korrekte Latyn aangevoer, waar hy in Avignon verplig sou wees om onder geleerdes te beweeg wat ’n suiwerder vorm van Latyn sou praat. Hierdie anekdote wat vir ons vertel word deur Gregorius van Tours in sy Geskiedenis van die Franke dui reeds op die duidelik waarneembare verskil in die kultuur en taal in die Suidelike en Noordelike dele van die sesde eeuse Gallië (Gregorius Turonensis, 1951:6.9.

  16. Die pastorale begeleiding van predikante van die Nederduitse ...

    African Journals Online (AJOL)

    21 Jan 2013 ... Die tughandeling en pastorale begeleiding. 16. Hoe belangrik dink u is die volgende vereistes ten opsigte van die pastoraat tydens die tughandeling. Gebruik die volgende skaal: 1 = Onbelangrik; 2 =Redelik belangrik;. 3 = Nie baie belangrik, maar ook nie onbelangrik nie; 4 = Belangrik; 5 = Uiters belangrik.

  17. Die teologiese debat: Die waarde of betekenis daarvan

    African Journals Online (AJOL)

    'n gemeenskaplike waarheid te kom, nogal betreklik. In 'n poging om 'n paar groot lyne te trek oor hierdie saak, kan die volgende by wyse van oorsig en inleiding na vore gebring word. 2. lETSOORDffiAARDVANDIETEOLOGIE. Voordat iets oor die debat in die teologie gesê word, is dit tog nodig om die aard van die teologie ...

  18. Die ontmaskering van die bose: Eksegetiese perspektiewe op ...

    African Journals Online (AJOL)

    p1243322

    sewentiende / agtiende eeuse Engelse skrywer van die befaamde verhaal Robinson Crusoe. Hy was ook die skrywer van 'n aanvanklik anonieme pamflet The Shortest Way with the. Dissenters. In die werk vra hy skynbaar vir 'n genadelose hantering en uitwissing van die opponente (dissenters) van die Anglikaanse kerk, ...

  19. die ouderling in twee kerkordes in die dordtse tradisie

    African Journals Online (AJOL)

    'n koning en 'n nederige pion. Die teendeel is waar. Noordmans wys op die ironie dat die “eenvoudige” ouderling die “magtige” pous – in Roomse terme – kon skaakmat sit. Dit was by Calvyn moontlik omdat dit in 'n kerk nie om feilbare menslike mag of status gaan nie, maar die outoriteit en status van Christus deur Sy ...

  20. Enkele aspekte van kerklike dissipline uit die Kerkorde van die ...

    African Journals Online (AJOL)

    p1243322

    1989:431). Die appèlartikel staan in die Kerkorde van die Sinode van. Dordrecht 1578 as Artikel 19 en word in die Kerkorde van Middelburg 1581 en daarna, gekombineer met Artikel 23 wat by Dordrecht 1578 nog 'n afsonderlike plek inneem. Laasgenoemde Artikel handel daaroor dat die meerderheid stemme bindend sal ...

  1. Alternatiewe vir die huwelik in die huidige permissiewe maatskappy?

    Directory of Open Access Journals (Sweden)

    A. C. Barnard

    1980-08-01

    Full Text Available Die wereld het op elke terrein onherkenbaar verander Die mens se kennis en vermoe op elke terrein van die lewe, het onvoorstelbaar toegeneem. Hy kom in 'n posisie dat hy meen hy weet alles, kan alles deurvors en alles doen. Daarmee het die magtige mens in die sentrum van alles te staan gekom.

  2. Die konteks vir die keuse van geriefsvoedsel van bepaalde ...

    African Journals Online (AJOL)

    Seugnet

    Dis maar die gewone rys, vleis, aartappels, pampoen en boontjies. As sy hoender berei het, sal ek 'n sousie maak.” Die feit dat 'n huiswerker die voorafbereiding van die maaltyd behartig, verklaar moontlik waarom hierdie deelnemers geredelik vars produkte aankoop vir hoof- maaltye gedurende die week, maar ook ...

  3. Vertellersperspektief en die 'temporele' funksie van die Ou ...

    African Journals Online (AJOL)

    ... 1969b) het in twee afsonderlike artikels, respektiewelik oor die kruisiging en die opstanding, oortuigend aange- toon dat die 'Wende der Zeit' op hierdie punt in die Matteus-evangelie plaasvind (vgl ook Meier 1975: 207). Hy skryf in die eerste artikel: 'Dieser Text (27, 51 ff.) ist hochst bemerkenswert. Der Tod Jesu bewirkt.

  4. Die funksie van die ^danksegging(s)' in 1 Tessalonisense

    African Journals Online (AJOL)

    word die leser vir sy goeie daad bedank. Wanneer die 'danksegging(s)' in 1 Tessalonisense ontleed word, word dit duidelik dat dit nie aan hierdie reëls vir 'n danksegging voldoen nie. Alhoewel die drie. 'dankseggingsgedeeltes' 'n taalhandeling is waarin die geenkodeerde outeur sy dank uitspreek, kan die betrokke ...

  5. Die owerheidsinmenging met betrekking tot kerklike tughandelinge.

    Directory of Open Access Journals (Sweden)

    L. Roeleveld

    1982-06-01

    Full Text Available Volgens art 29 NGB is die merktekens van die ware kerk die suiwere prediking van die Evangelie, die suiwere bediening van die Sakramente en die gebruik van die kerklike tug. Art. 32 NGB spreek uit dat die Kerkorde nie mag afwyk van wat Christus ingestel het nie. Menslike vindinge en wette om die gewetens te bind en te dwing, moet daarom verwerp word. Die ekskommunikasie of die ban moet toegepas word volgens die Woord van God.

  6. -Die leksikografiese hantering van woordgroepstamme

    African Journals Online (AJOL)

    buite die behandelingsterrein van die heersende leksikografiese praktyk val. Ondanks hierdie implikasies hoef die ~~ntering van woordgroepstamme nie vir die leksikograaf problema ties te wees nie. Die Afrikaanse leksikon bevat 'n relatief klein aantal woordgroepstamme. Hulle sal nie 'n beduidende deel van. R ep rod u.

  7. Die bevordering van geesteswetenskaplike studie*

    Directory of Open Access Journals (Sweden)

    M. Elaine Botha

    1980-03-01

    Full Text Available Hierdie tema sou op ’n verskeidenheid van wyses aangepak kon word: Eerstens is dit moontlik om planne te bedink op grond waarvan die studentegetalle in die geesteswetenskappe verhoog sou kon word. Tweedens is dit moontlik om ’n soort wetenskaplike rasionalisasie te verskaf vir die feit dat die oënskynlik anachronis- tiese geesteswetenskappe nog steeds aangebied word in ’n tyd waarin die hele samelewing in die teken van die wetenskap en die tegniek staan. Dit sou natuurlik ook moontlik wees om die tema aan te pak vanuit ’n statistiese ontleding van die stand van die geesteswetenskappe en daardeur op tendense en ontwikkelingsrig- tinge te dui. Natuurlik sou daar voldoende grond wees om ook die hele kwessie van die gebrekkige finansiering van die geesteswetenskappe aan die orde te stel en ’n pleidooi te lewer vir beter salariëring van geesteswetenskaplik-geskooldes, beter beurse vir studente in die geesteswetenskappe en beslis meer geleenthede vir na- vorsing in die geesteswetenskappe. Voorts sou die uiteindelike werksituasie van die geesteswetenskaplik-geskoolde in oënskou geneem kon word. Indien daar ’n oor- skot van geesteswetenskaplik-geskooldes bestaan, sou dit geremedieer moes word en indien daar ’n tekort aan dergelike geskooldes sou bestaan, sou planne beraam moes word vir die aanmoediging van studie in hierdie rigting.

  8. Aanbid die godsdienste dieselfde God?

    African Journals Online (AJOL)

    Aquinas se verstaan van die implisiete geloof. Erasmus se poging om die Chris- telike dogma tot 'n absolute minimum te reduseer en Servet se verwerping van die. Triniteitsleer, het dieselfde intensie (Galling 1961:1062). Die poging van Helena Petrofna Blavatsky se Teosofiese Vereniging wat in. 1875 in die VSA gestig is, ...

  9. Die BINGO-hulpverleningsprogram vir die begaafde seun wat ...

    African Journals Online (AJOL)

    Erna Kinsey

    hulpverleningprogram is empiries ondersoek nadat dit ontwerp is en die resultate word later bespreek. Probleemstelling. Dit is 'n probleem dat soveel begaafdes akademies onderpresteer en nie hul volle potensiaal bereik nie. (Kyk die bespreking van die ...

  10. Electroreflectance of CuInS{sub 2}-solar cells for the optimization of the process parameters during the absorbers production process; Elektroreflexion an CuInS{sub 2}-Solarzellen im Hinblick auf die Optimierung der Prozessparameter bei der Absorber-Herstellung

    Energy Technology Data Exchange (ETDEWEB)

    Henninger, R.

    2002-07-01

    CuInS{sub 2} thin film solar cells were prepared by a new sequential process. The quality of these layers and the conversion efficiency of the solar cells depends on the process parameters of the sequential process. Electroreflectance measurements are used to characterize these solar cells. This method is suitable to measure optical properties like band gap energy and to detect secondary phases in the vicinity of the heterojunction and defects in the semiconductor. Electroreflectance measurements of the thin film solar cells shows clearly a dependence of film growth from the process parameters copper to indium ratio and sulfurization temperature. From the correlation of electroreflectance results with photoluminescence, X-ray-diffraction and external quantum efficiency measurements a model of film growth was derived. Solar cells made from optimized CuInS{sub 2} films reach an active area efficiency of 12,5%. This is the best efficiency reported so far for this type of solar cell. (orig.) [German] Mit einem neuen sequentiellen Verfahren wurden CuInS{sub 2}-Duennfilme fuer die Solarzellen-Anwendung hergestellt. Die Qualitaet dieser Schichten und damit der Solarzellenwirkungsgrad haengen von den Prozessparametern des sequentiellen Prozesses ab. Elektroreflexion wurde als Messverfahren zur Charakterisierung der fertigen Solarzellen eingesetzt. Dieses Verfahren ist geeignet um optische Eigenschaften, wie die Bandlueckenenergie, zu bestimmen und Fremdphasen in der Naehe des pn-Ueberganges sowie Defekte im Halbleiter nachzuweisen. In Elektroreflexionsmessungen an den hergestellten Duennfilmsolarzellen zeigte sich deutlich eine Abhaengigkeit des Schichtwachstums von den Prozessparametern Kupfer-Indium-Verhaeltnis und Sulfurisierungstemperatur. Aus der Korrelation der Elektroreflexionsergebnisse mit Photolumineszenz-, Roentgenbeugungs- und Quantenausbeutemessungen wurde ein Modell zur Schichtbildung von CuInS{sub 2} abgeleitet. Solarzellen aus optimierten CuInS{sub 2

  11. Wall-slip of highly filled powder injection molding compounds: Effect of flow channel geometry and roughness

    Science.gov (United States)

    Hausnerova, Berenika; Sanetrnik, Daniel; Paravanova, Gordana

    2014-05-01

    The paper deals with the rheological behavior of highly filled compounds proceeded via powder injection molding (PIM) and applied in many sectors of industry (automotive, medicine, electronic or military). Online rheometer equipped with slit dies varying in surface roughness and dimensions was applied to investigate the wall-slip as a rheological phenomenon, which can be considered as a parameter indicating the separation of compound components (polymer binder and metallic powder) during high shear rates when injection molded.

  12. Die Wunderkritik Immanuel Kants

    OpenAIRE

    Peddicord, Clark

    2001-01-01

    Die Problematik übernatürlicher Eingriffe in den gesetzesartigen Ablauf der Natur hat nicht nur Theologen sondern auch Naturphilosophen und Erkenntnistheoretiker immer wieder beschäftigt. Diese Frage ist nicht erst in der heutigen Diskussion entstanden. Sie hat tiefe Wurzeln, die bis in die Antike zurückreichen. Aber ihre moderne Gestalt stammt aus der Anfangszeit der modernen Naturphilosophie im 17. und 18. Jahrhundert. Als der prägende Philosoph der deutschen Aufklärung hat sich Im...

  13. Gadamer en die estetiese rekonstruksie van die antiaanse projek ...

    African Journals Online (AJOL)

    Gadamer en die estetiese rekonstruksie van die antiaanse projek: Vir 'n kontekstuele kosmopolitanisme. (Gadamer and the aesthetical reconstruction of the Kantian project. For a contextual cosmopolitanism).

  14. Die christelike lewens- en wêreldbeskouing en die toets van die 20e eeu.*

    Directory of Open Access Journals (Sweden)

    J. A. Heyns

    1957-03-01

    Full Text Available Dat die Christelike lewens- en wêreldbeskouing met die 20e eeu (bedoel word die geestesstrominge van ons tyd nie bloot deur ’n kopulatiewe,,en” maar deur die woord „toets” met mekaar verbind word, dui op die heel besondere verhouding wat daar tussen beide bestaan. Ons bedoeling is dan ook nie om ’n indringende analise van die een of van die ander te gee nie, maar om die aandag te vestig op die fundamentele antitese tussen beide.

  15. Die vestiging van die Kerk in Natal, die Vrystaat en Transvaal na ...

    African Journals Online (AJOL)

    doop bedien, geleentheid is gegee vir die aflegging van geloofsbelyde- nis terwyl Lindley ook 'n lidmaatregister aangelê het. Lindley sou die Transvaal weer 'n keer in Mei en Junie 1844 besoek. Tydens die geleentheid sou hy so ver gaan as die Magaliesberge en moontlik ook die oostelike buitev^ryke van Marico besoek.

  16. Die inhoud en die doel van die Nederduitsch Hervormde Kerk se ...

    African Journals Online (AJOL)

    sie (Barth 1967:667). Sekularisasie bedreig die kerk telkens wanneer hy uit die oog verloor dat hy dienskneg van Christus is. Dit is dan wanneer die kerk nie ... Daarmee bedoel Barth nie 'n wesensidentifikasie nie, maar dat Christus ..... kan die ampte op geen ander wyse doen nie as deur die Woord te bedien, in sy ap-.

  17. Die Bibliothek des Bezirksmuseums Josefstadt

    Directory of Open Access Journals (Sweden)

    Maria Ettl

    2016-02-01

    Josefstadt in Wien werden die Herkunft der Bibliotheksbestände und die beengte Raumsituation beschrieben. Abschließend wird auf die Erfassung der Medien mittels der Bibliothekssoftware „Biblioweb“ eingegangen.

  18. Die verband tussen die sielkundige kontrak en organisasieverbondenheid

    Directory of Open Access Journals (Sweden)

    K. J. Stanz

    1999-06-01

    Full Text Available The relationship between the psychological contract and organisational commitment. The aim of this study is to design a measuring instrument with acceptable metric characteristics for the strength of the psychological contract within the South African context, and to determine empirically the relation between the strength of the psychological contract and organisational commitment. The Dhammanungune Model served as foundation for the design of the Strength of the Psychological Contract Questionnaire which consists of two scales namely, a needs expectation scale and a needs fulfilment expectation scale. The items of each scale have been formulated in the manner that ensures that the respondent reacts consecutively to two instructions namely, (a the level of the expectation and (b the importance of the expectation. This questionnaire was administered together with the Organisational Commitment Questionnaire to two population groups within the military environment. The Pearson Product Moment Correlation was calculated between the strength of the psychological contract and organisational commitment and the significance of the correlations was evaluated. Opsomming Die doel van die studie is om 'n meetinstrument met aanvaarbare metriese eienskappe vir die sterkte van die sielkundige kontrak vir Suid-Afrikaanse omstandighede te ontwerp en om empirics die verband tussen die sterkte van die sielkundige kontrak en organisasieverbondenheid te bepaal. Die sterkte van die sielkundige kontrak vraelys is op grond van die Dhammanungune-model ontwerp en het uit twee skale naamlik, die behoefteverwagting- en vervullingsverwagtingskale bestaan. Items vir eike skaal is sodanig geformuleer dat die respondent agteropeenvolgens op twee instruksies naamlik (a die vlak van die verwagting en (b die belangrikheid van die verwagting moet reageer. Die vraelys is saam met die organisasieverbondenheidsvraelys op twee populasies uit 'n militere omgewing toegepas. Die Pearson

  19. The day Madiba died

    African Journals Online (AJOL)

    8 Apr 2016 ... geweld (“Utopia” [129–41]—Christina van Deventer), die seksuele misbruik van kinders (“Een, twee, drie, blok myself”. [98–103]—Ilisna Nel), posttraumatiese stres (“Ontspoor” [117–22]—Tanya van. Buuren) en geestestoornisse (“Lettie se verlies” [150–5]—Elani Venter) word ondersoek. In die satiriese ...

  20. Die postpolitische Stadt

    Directory of Open Access Journals (Sweden)

    Erik Swyngedouw

    2013-12-01

    Full Text Available Die Polis ist tot, es lebe die kreative Stadt! Während die Stadt, zumindest in Teilen des städtischen Raums, blüht und gedeiht, scheint die Polis im idealisierten griechischen Sinn dem Untergang geweiht; in diesem Verständnis ist sie der Ort der öffentlichen politischen Auseinandersetzung und demokratischen Unterhandlung und somit eine Stätte (oft radikaler Abweichung und Unstimmigkeit, an der die politische Subjektivierung buchstäblich ihren Platz hat. Diese Figur einer entpolitisierten (oder postpolitischen und postdemokratischen Stadt im Spätkapitalismus bildet das Leitmotiv des vorliegenden Beitrags. Ich lehne mich dabei an Jacques Rancière, Slavoj Žižek, Chantal Mouffe, Mustafa Dikeç, Alain Badiou und andere Kritiker jenes zynischen Radikalismus an, der dafür gesorgt hat, dass eine kritische Theorie und eine radikale politische Praxis ohnmächtig und unfruchtbar vor jenen entpolitisierenden Gesten stehen, die in der polizeilichen Ordnung des zeitgenössischen neoliberalen Spätkapitalismus als Stadtentwicklungspolitik [urban policy] und städtische Politik [urban politics] gelten. Ziel meiner Intervention ist es, das Politische wieder in den Mittelpunkt der zeitgenössischen Debatten über das Urbane zu stellen. [...

  1. Effect of semiconductor polymer backbone structures and side-chain parameters on the facile separation of semiconducting single-walled carbon nanotubes from as-synthesized mixtures

    Science.gov (United States)

    Lee, Dennis T.; Chung, Jong Won; Park, Geonhee; Kim, Yun-Tae; Lee, Chang Young; Cho, Yeonchoo; Yoo, Pil J.; Han, Jae-Hee; Shin, Hyeon-Jin; Kim, Woo-Jae

    2018-01-01

    Semiconducting single-walled carbon nanotubes (SWNTs) show promise as core materials for next-generation solar cells and nanoelectronic devices. However, most commercial SWNT production methods generate mixtures of metallic SWNTs (m-SWNTs) and semiconducting SWNT (sc-SWNTs). Therefore, sc-SWNTs must be separated from their original mixtures before use. In this study, we investigated a polymer-based, noncovalent sc-SWNT separation approach, which is simple to perform and does not disrupt the electrical properties of the SWNTs, thus improving the performance of the corresponding sc-SWNT-based applications. By systematically investigating the effect that different structural features of the semiconductor polymer have on the separation of sc-SWNTs, we discovered that the length and configuration of the alkyl side chains and the rigidity of the backbone structure exert significant effects on the efficiency of sc-SWNT separation. We also found that electron transfer between the semiconductor polymers and sc-SWNTs is strongly affected by their energy-level alignment, which can be tailored by controlling the donor-acceptor configuration in the polymer backbone structures. Among the polymers investigated, the highly planar P8T2Z-C12 semiconductor polymer showed the best sc-SWNT separation efficiency and unprecedentedly strong electronic interaction with the sc-SWNTs, which is important for improving their performance in applications.

  2. Ambiguous walls

    DEFF Research Database (Denmark)

    Mody, Astrid

    2012-01-01

    of “ambiguous walls” as a more “critical” approach to design [1]. The concept of ambiguous walls refers to the diffuse status a lumious and possibly responsive wall will have. Instead of confining it can open up. Instead of having a static appearance, it becomes a context over time. Instead of being hard...... and flat, “ambiguous walls” combine softness, tectonics and three-dimensionality. The paper considers a selection of luminious surfaces and reflects on the extent of their ambiguous qualities. Initial ideas for new directions for the wall will be essayed through the discussion....

  3. Die histologie en ultrastruktuur van die hepatopankreas van die bloukurper Oreochromis mossambicus

    Directory of Open Access Journals (Sweden)

    M. M. Nel

    1990-07-01

    Full Text Available Die histologie en ultrastruktuur van die hepatopankreas van die bloukurper Oreochromis mossambicus word beskryf. ’n Dun bindweefselkapsel omring die lewer. Die hepatosietrangskikking vertoon as lobules, met die koorde van hepatosiete wat vanaf ’n sentrale vene uitradieer en met mekaar anastomaseer. Indiwiduele lewerlohules vertoon nie duidelike grense nie, maar enkele duidelike triades word wel in die lewer van O. mossambicus aangetref. Die hepatosiete bevat ’n enkele ronde kern met ’n duidelike nukleolus en die growwe endoplasmiese retikula kom in twee of meer rye om die kerne en teen die selgrense van die hepatosiete voor. Die ander sitoplasmiese organelle kom verspreid in die hepatosietsitoplasma voor. Die eksokriene pankreasselle is om die portale venes gesetel. Die kerne van hierdie selle is rond en is hasaal in die kubies- tot silindervormige selle gelee. ’n Goedontwikkelde growwe endoplasmiese retikulum — vesikulêr, tubulêr en sirkulêr in vorm — en sektretoriese granules wat apikaal in die sel gelee is, kom voor.

  4. Die opleiding van bedryfsielkundiges aan die universiteit van die Oranje-Vrystaat

    Directory of Open Access Journals (Sweden)

    H. P. Langenhoven

    1977-11-01

    Full Text Available Die Departement Bedryfsielkunde is in 1968 as 'n volwaardige departement in die Fakulteit van Ekonomiese en Administratiewe Wetenskappe aan die Vrystaatse Universiteit ingestel. Voorheen is die vak vir etlike jare deur die Departement Sielkunde aangebied. Bedryfsielkunde kan vir die B.Com., B.Admin., B.Soc.Sc. en B.P.L. (Baccalaureus in Personeelleiding graadrigtings geneem word. Die opleidingspersoneel bestaan tans uit 'n Professor, 2 Senior Lektore en 2 Lektore. Daar is ook 'n Senior Lektor/Navorser en Senior Vakkundige Beampte in die Afdeling Personeelnavorsing, wat onder leiding van die hoof van die departement funksioneer. Verder beskik die departement oor die dienste van twee dames wat albei halfdag werk, naamlik 'n Akademiese Assistent en 'n Tikster.

  5. Die teologiese arbeid van Antonius HJ Gunneweg

    African Journals Online (AJOL)

    En dis 'n klein treetjie van klagte na aanklag en na protes teen die gode, die heersers wat die mens vernietig deur hom oor sy ware lewe te bedrieg. Die ideologie eis dan ook dienooreenkomstig die bevryding en emansipasie van die mens van die gode en van God (1983: 118—119). Volgens die Jahwis is dit die slang wat, ...

  6. DIE SUID-AFRIKAANSE JEUG IN VOORTREKKERTYDPERK

    African Journals Online (AJOL)

    was dit 'n groot avontuur en in hulle verbeelding het hulle die aantreklikste visioene geskilder. Die groter kinders, wat gehard was deur die gevare wat gedurig die grensboere bedreig het, sou 'n beter besef van die ems van die Groot Trek gehad het.3. Die ouers, veral die moeders, het die kinders nie toegelaat om wild en ...

  7. Quantum-mechanical parameters for the risk assessment of multi-walled carbon-nanotubes: A study using adsorption of probe compounds and its application to biomolecules.

    Science.gov (United States)

    Chayawan; Vikas

    2016-11-01

    This work forwards new insights into the risk-assessment of multi-walled carbon-nanotubes (MWCNTs) while analysing the role of quantum-mechanical interactions between the electrons in the adsorption of probe compounds and biomolecules by MWCNTs. For this, the quantitative models are developed using quantum-chemical descriptors and their electron-correlation contribution. The major quantum-chemical factors contributing to the adsorption are found to be mean polarizability, electron-correlation energy, and electron-correlation contribution to the absolute electronegativity and LUMO energy. The proposed models, based on only three quantum-chemical factors, are found to be even more robust and predictive than the previously known five or four factors based linear free-energy and solvation-energy relationships. The proposed models are employed to predict the adsorption of biomolecules including steroid hormones and DNA bases. The steroid hormones are predicted to be strongly adsorbed by the MWCNTs, with the order: hydrocortisone > aldosterone > progesterone > ethinyl-oestradiol > testosterone > oestradiol, whereas the DNA bases are found to be relatively less adsorbed but follow the order as: guanine > adenine > thymine > cytosine > uracil. Besides these, the developed electron-correlation based models predict several insecticides, pesticides, herbicides, fungicides, plasticizers and antimicrobial agents in cosmetics, to be strongly adsorbed by the carbon-nanotubes. The present study proposes that the instantaneous inter-electronic interactions may be quite significant in various physico-chemical processes involving MWCNTs, and can be used as a reliable predictor for their risk assessment. Copyright © 2016 Elsevier Ltd. All rights reserved.

  8. Distortion and Residual Stress in High-Pressure Die Castings: Simulation and Measurements

    Science.gov (United States)

    Hofer, P.; Kaschnitz, E.; Schumacher, P.

    2014-09-01

    Two individual high-pressure die casting geometries were developed to study the influence of process parameters and alloy composition on the distortion behavior of aluminum alloy castings. These geometries, a stress lattice and a V-shaped lid, tend to form residual stress due to a difference in wall thickness and a deliberate massive gating system. Castings were produced from two alloys: AlSi12(Fe) and AlSi10MnMg. In the experimental castings, the influence of important process parameters such as die temperature, ejection time, and cooling regime was examined. The time evolution of process temperatures was measured using thermal imaging. Subsequent to casting, distortion was measured by means of a tactile measuring device at ambient temperatures. The measured results were compared against a numerical process and stress simulations of the casting, ejection, and cooling process using the commercial finite element method software ANSYS Workbench. The heat transfer coefficients were adapted to the temperature distributions of the die, and the castings were observed by thermal imaging. A survey of the results of the comparison between simulation and experiment is given for both alloys.

  9. Simulation of distortion and residual stress in high pressure die casting - modelling and experiments

    Science.gov (United States)

    Hofer, P.; Kaschnitz, E.; Schumacher, P.

    2012-07-01

    Two individual high-pressure die-casting geometries were developed in order to study the influence of process parameters and different alloys on the distortion behaviour of castings. These geometries were a stress lattice and a V-shaped sample tending to form residual stress due to different wall thickness respectively by a deliberate massive gating system. In the experimental castings the influence of the most important process parameters such as die temperature and die opening time and the cooling regime was examined. The time evolution of process temperatures was measured using thermal imaging. The heat transfer coefficients were adapted to the observed temperature distributions. Castings were produced from the two alloys AlSi12 and AlSi10MnMg. The distortion of the castings was measured by means of a tactile measuring device. For the alloy AlSi10MnMg thermo-physical and thermo-mechanical data were obtained using differential scanning calorimetry, laser flash technique, dilatometry and tensile testing at elevated temperatures. These data were used for modelling the material behaviour of the AlSi10MnMg alloy in the numerical model while for the alloy AlSi12(Fe) literature data were used. Process and stress simulation were conducted using the commercial FEM software ANSYS Workbench. A survey on the results of the comparison between simulation and experiment is given for both alloys.

  10. Die benutting van vraelyste met die oog op meer effektiewe ...

    African Journals Online (AJOL)

    UPuser

    dat individue nie altyd eenders dink en doen ten opsigte van sekere sake nie, ontstaan daar soms misverstande wat kan lei tot konflik. Konflikhantering is dus 'n uiters ... “extended family issues” onder die mees problematiese sake in die vroeë jare van die huwelik. Pretorius (1996:200) bespreek die saak van emosionele.

  11. Besinning oor die apostolaat in die Nederduitsch Hervormde Kerk

    African Journals Online (AJOL)

    Dink onder andere aan sy artikels oor die Bybelse argeologie, artikels en publikasies op die terrein van die etiek soos byvoorbeeld oor selfmoord, eutanasie, sterwensbegeleiding, aborsie, padverkeer en so meer. Professioneel is hy formeel dogmatikus. Nogtans het hy, behalwe 'n besondere aanvoeling vir die pas-.

  12. voorveronderstellings in die hantering van die verhouding tussen ou ...

    African Journals Online (AJOL)

    is en sy hele siening van die Ou-Testamentiese hermeneutiek kleur. So beoog hierdie artikel om na aanleiding van Baumgärtel 'n aantal voorveronderstellings op die tafel te plaas wat bepalend is vir die wyse waarop die verhouding tussen Ou en Nuwe Testament beskryf kan word. Dus, na aanleiding van Baumgärtel word ...

  13. DIE EINDE VAN SENDING Fases in die Sendingbedryf

    African Journals Online (AJOL)

    ontwikkeling vir die verskeie rasse woonagtig in Suid-Afrika, beter bekend as die beleid van apartheid. (Inderdaad was hierdie gewraakte gedagtes nogal 'n integrale deel van die Kerk se Sendingbeleid soos wat dit in die vroeë 20ste eeu ontwikkel is.) Maar terwyl hierdie kritiek in feitlik alle opsigte toegegee kan word, is dit ...

  14. Die 'postmoderne' stempel in die Nuwe-Testamentiese hermeneutiek

    African Journals Online (AJOL)

    27; vgl De Beer 1986:436). Betekenis bestaan nie suiwer in die idee en ook nie in die verwysing tussen teken en idee nie. In die dekonstruksie verval die metafisiese, se- manties-referensiele verhouding tussen betekenaar en betekende (Van ...

  15. Die Suid-Afrikaanse Oorlogsekonomie gedurende die Tweede ...

    African Journals Online (AJOL)

    is daar on- middellik stappe gedoen om die staalfabriek te. Pretoria uit te brei met die doel om die produksie .... artikels soos seep, kerse, aptekersgoedere, verf, poli- toer, ens ingesluit. 'n Groot persentasie hiervan sowel as veeartsenykundige middels en insekte- middels vir die bestryding is plaaslike vervaar- dig.37. Hout.

  16. die doeltreffendheid van die afrikaanse woordelys en spelreels as ...

    African Journals Online (AJOL)

    Dit is die doel van hierdie artikel. eireels. Volgens die AWS word die Afrikaanse spelreels op .... beperkte getal eenvoudige 'reels saamgevat kan word nie. Dit geld van alle terreine van taalgebruik: Anglisisraes en ander -ismes, woordgebruike, sinsbou, die gebruik van hoofletters, koppel- tekens, spelling, ens.'" Alhoewel ...

  17. Die inkortingsneller moet en die woordeboek | Prinsloo | Lexikos

    African Journals Online (AJOL)

    Die AfrikaanSe hulpwerkwoord mod kan binne sekere kontekste as inkortingsneller ten opsigte van 'n saamgestelde hoofwerkwoord 'optree, waardeur laasgenoemde ingekort word sander dat die semantiese inhoud van die sin verander ('n voorwaarde, trouens, van alle inkorting). Die omstandighede waaronder dit ...

  18. besonderhede aangaande in aantal geboue op die terrein van die ...

    African Journals Online (AJOL)

    2 'n Militere Kamp. Op 4 Mei 1877 het die eerste gereelde Britse troepe op Pretoria aangekom. 'n Kamp is opgeslaan ten suide van die dorp en op 'n kaart van Pretoria wat van. 14 November ... korps van de Zuid-Afrikaa115che. Republiek, ... Hierdie eenheid is op die terrein van die v00rmalige Britse militere kamp en aan-.

  19. die aard, studieveld en funksie van die krygsgeskiedenis1

    African Journals Online (AJOL)

    hede dit geskied het en wat die resul- toot daarvan was, sal minder gene~ wees om die foute van die verlede te herhaal of hulpeloos in die donker rond te tas wanneer hulle met 'n pro- bleem gekonfronteer word.29 Historiese. 20. M. Howard. 'The Useand Abuse of Military History'. 4 - 5: T.EGriess. 'A Perspective on Military ...

  20. Die funksie van die ^danksegging(s)' in 1 Tessalonisense

    African Journals Online (AJOL)

    Vanwee die problema- tiek rondom die genre word die genre van 1 Tessalonisense dus nie in hierdie artikel as vertrekpunt geneem nie. Vir die doel van hierdie artikel word 'retoriese situasie' soos volg verstaan: '[A] complex of persons, events, objects and relations presenting an actual or potential. ISSN 0259 9422 = HTS ...

  1. Stuttgart, 1952. DIE HUIDIGE STAND VAN DIE ONDERSOEK TEN ...

    African Journals Online (AJOL)

    Test

    hy hom rig teen sekere gnostici (die Valentiniane?) wat II Tim. 2:2 uitlê as verwysing na 'n esoteriese evangelie wat slegs aan ingewydes oorgelewer moet word. Op grond van hierdie skrale berigte het die gissings oor wat die Evangelie van die Waarheid was en wat dit bevat het, begin. Ene J ohannes K reyenbuhl het ...

  2. die waarde van die ou testament volgens hf kohlbrugge

    African Journals Online (AJOL)

    - skrif met die grootste bekwaamheid. Juis in die tyd waarin hy met die doktorale studie besig was, was hy lank siek. Hierdie beproewing sou egter ryk vrugte dra. In die geestelike krisis wat daarmee gepaard gegaan het, is Kohlbrugge — so ...

  3. Die uniform van die Transvaalse staatsartillerie | Bouch | Scientia ...

    African Journals Online (AJOL)

    Die Transvaalse Staatsartillerie (TSA), as 'n gereelde en voltydse militêre eenheid van die ou Suid-Afrikaanse Republiek, het gespog met sy eie kenmerkende uniform. Keywords: Die Transvaalse Staatsartillerie (TSA); militêre eenheid van die ou Suid-Afrikaanse Republiek; velddiens- of someruniform; parade- of ...

  4. Die mens as sondaar - Die beskouing van Karl Barth

    African Journals Online (AJOL)

    is no longer situated in the heart of human being, but in social, economical and political structures. In this ...... openbaring van die eintlikheid van die mens: jy is die man. Aan hierdie verwyt kan 'n mens jou nog .... juis net SÓ gered lean word, is kenbaar in eie persoon 'n verlore mens. Só ken die mens-van-sonde homself.

  5. Thermal fatigue cracking of die-casting dies

    Directory of Open Access Journals (Sweden)

    Thermal fatigue cracking of die-casting dies

    2010-01-01

    Full Text Available Die-casting dies are exposed to high thermal and mechanical loads. Thermal fatigue cracking of dies due to thermal cycling may importantly shorten the life-time of the die. Cracks degrade the surface quality of dies and consequently the surface of castings. In this study, thermal fatigue cracking of dies was analyzed during the process of die casting aluminium alloys. During the process cracks were observed and measured and their location and size were determined. Thermal and mechanical loads cause high local stresses and consequently surface cracks. First cracks occur as early as after 2000 cycles and propagate progressively with cycles.

  6. Diskussie oor die millenium en die herstel van Israel

    Directory of Open Access Journals (Sweden)

    J. J. Engelbrecht van Waverley

    1978-06-01

    Full Text Available Dit verheug my dat daar eindelik gereageer word op my boekie. Behalwe telefoonoproepe en briewe van medechiliaste was daar tot dusver geen kommentaar van anti-chiliastiese kant. Ek het die boekie aan ongeveer 1800 predikante en professore gestuur en vriendelik uitgenooi tot nuwe besinning. Net soos oor die soteriologie, is die Bybel nêrens in teëspraak met homself oor die eskatologie nie. God gee in sy Woord nie vir ons drie verskillende toekomsbeelde om uit te kies nie. God is een en sy profetiese Woord is deurgaans eenstemmig m.b.t. die raad van God oor Israel, die nasies en die kerk.

  7. DIE BETREKKING TUSSEN JESUS EN JOHANNES DIE DOPER Na ...

    African Journals Online (AJOL)

    Test

    353 die Septuagint-lesing van. I Kon. 19:20 inderdaad ook herstel. Nou is dit opvallend dat die. Septuagint, waar dit gaan om die navolging van God, by voorkeur pebruik maak van die uitdrukking, aÁro/ouíAem opisö byvoorbeeld in. Josua 14:9 maar van poreuesiAa: opisö waar uitdrukking gegee wil word aan die naloop ...

  8. AFRIKAANS EN DIE EERSTE VRYHEIDSOORLOt ..

    African Journals Online (AJOL)

    en 'n paar van die opgevoede. Afrikaners praat nag suiwer. Nederlands. b. Die Afrikaners het almal by deftige geleent- hede soas in die gebed, op politieke vergaderings en in gemeensame briefwissel- ing 'n geleentheids-Nederlands gebruik, wat egter reeds 'n stylvorm van Afrikaans was. In die gewone omgang het hulle, ...

  9. Voedingsnavorsing met die weidende dier

    African Journals Online (AJOL)

    van veral beeste (Bisschop, 1964; Niemann, Lombard & Van. Schalkwyk, 1963). In teenstelling met die relatiewe groot hoeveelheid inligting oor die chemiese samestelling van natuurlike weidings, is daar betreklik min bekend oor die verteerbaarheid en vrywillige in- name daarvan deur herkouers. 'n Skerp daling in die ...

  10. PRETORIA GEDURENDE DIE EERSTE VRYDEIDSOORLOG

    African Journals Online (AJOL)

    Teen die einde van 1880 het hierdie oplewing onder die. Transvalers 'n hoogtepunt bereik toe tydens die vergadering by Paardekraal op 8 Desember 1880 besluit is om tot die ... hulle in Transvaal en veral in Pretoria gevestig sodat daar teen Maart ..... admiration, for they have the additional anxiety to bear in knowing that ...

  11. Aanbid die godsdienste dieselfde God?

    African Journals Online (AJOL)

    Derhalwe is. Christus dan die voile Selfmeedeling van God. In Hom is die bonatuurlike eksisten- siaal finaal en onherroeplik meegedeel. Hieruit kan Rahner nou vier stellings stcl: * die Christendom verstaan homself as die eintlike godsdiens;. * ander godsdienste het nietemin bonatuurlike waarheidselemente en is daarom.

  12. Die Bantoe indie gevorderde arbeidsvorme*

    Directory of Open Access Journals (Sweden)

    J. H. Coetzee

    1961-03-01

    Full Text Available Die inhoud van hierdie voordrag is in hoofsaak ’n verwerking van ’n lesing oor The Bantu as a White Collar Worker wat ek vroeër vanjaar voor ’n byeenkoms van die Johannesburgse afdeling van die National Development Foundation gehou het. Derhalwe wil ek ook my erkentlikheid teenoor die liggaam betuig vir die verlof om dieselfde stof te gebruik ten bate (hopelik van die Afrika-Seminaar en terselfdertyd ook vir nuwe insigte waartoe die bespreking op genoemde byeenkoms my gelei het.

  13. Die inszenierte Autorin

    Directory of Open Access Journals (Sweden)

    Michiko Mae

    2008-11-01

    Full Text Available chs wird in seinem Aufbau durch die drei Phasen des Selbstfindungsprozesses, genauer der Selbsterfindung der ‚Schriftstellerin Yū Miri‘ in ihren Werken und ihren medialen Selbstinszenierungen strukturiert. Es gelingt Iwata-Weickgenannt sehr überzeugend, das Sichtbarmachen der performativen Konstruiertheit von Identität im Werk und Leben Yūs herauszuarbeiten. Sie zeigt dabei auch, dass das Konzept der Performativität ein sehr geeigneter Bezugsrahmen für die Analyse von Identitätsbildungsprozessen ist.

  14. Die implikasies van artikel 2 (1 (a van die wet op die nasionale onderwysbeleid, 1967

    Directory of Open Access Journals (Sweden)

    J. Bekker

    1969-03-01

    Full Text Available Op 31 Maart 1967 is die veelbesproke Wet op die Nasionale Onderwysbeleid, 1967 gepromulgeer. Daar is ’n raamwerk van tien beginsels neergelê wat onder meer handel oor sake soos Christelike karakter, nasionale karakter, moedertaalonderwys, die plek van die ouergemeenskap, vry onderwys, koordinasie op nasionale grondslag van leerplanne en kursusse, ens.

  15. Die uitbouing van die Bybelse kanon in antieke Judaïsme en die ...

    African Journals Online (AJOL)

    31 Jul 2015 ... Vergelyk Eusebius, 'n anti-Marcionitiese skrywer wat in 192/3 n.C. werk; Historia. Ecclesiasfica V 17, 2. verder gestimuleer is. Talle nuwe geskrifte het die lig gesien waaroor die kerk besluite moes neem en waarteen die kerk afgrensings moes doen. Vroeë omlyning van die versameling van boeke.

  16. enkele fasette van die problematiek van die akademikus by die skryf ...

    African Journals Online (AJOL)

    we, konferensies vir terugrapportering ens. ens. Op die oog of kan dit voor- kom asof die akademikus met soveel bronne te doen het dot hy eerder 'n oorvloed as te min inligting goon verkry. Hierdie aanname is egter van aile ... Feitlik aile dokumente in die SAWword opgestel met die uitsluitlike doel om vir weermagoptrede.

  17. liturgiese afleidings uit die kontinuïteit en diskontinuïteit van die ...

    African Journals Online (AJOL)

    die Nagmaal, om telkens liturgiese afleidings daaruit te probeer maak. 2. DIE ONTWIKKELING VAN DIE PASGA VAN DIE. EKSODUS TOT DIE TyD VAN ChRISTUS. Die Pasga is waarskynlik die een Ou-Testamentiese fees wat van belang is vir die navorsing oor die Nagmaal, juis omdat Jesus die Pasga doelbewus gekies.

  18. Thermal Fatigue of Die-Casting Dies: An Overview

    Directory of Open Access Journals (Sweden)

    Abdulhadi Hassan A.

    2016-01-01

    Full Text Available Coupled studies by experimental and numerical simulations are necessary for an increased understanding of the material behaviour as related to the interaction between the thermal and mechanical conditions. This paper focus on the mechanisms of thermal fatigue in the failure of dies and cores used in the die casting of aluminum alloys. The thermal fatigue resistance is expressed by two crack parameters which are the average maximum crack and the average cracked area. Samples of various types of H13 steel were compared with a standard H13 steel by testing under identical thermal fatigue cycles. To determine the thermal constraint developed in the sample during the test, a finite difference technique was used to obtain the temperature distribution, based on temperature measurements at the boundaries. The resulting stresses and strains were computed, and the strain calculated at the edge or weakest point of the sample was used to correlate the number of cycles to crack initiation. As the strain at the edge increased, the number of cycles to failure decreased. The influence of various factors on thermal fatigue behavior was studied including austenitizing temperature, surface condition, stress relieving, casting, vacuum melting, and resulfurization. The thermal fatigue resistance improved as the austenitizing temperature increased from 1750 to 2050ºF.

  19. DIE OPENBARINGSLEER VAN SCHILDER

    African Journals Online (AJOL)

    23 Volgens Schilder: ...maar God wil geen openbaring geven, die den mensch als't ware onder hypnose brengt en hem in dien zin overweldig (Om Woord en kerk III 1951:11). 24 Volgens Schilder: Maar de onuitputtelijkheid van het teeken komt u herinneren, dat heden Gods zelfopenbaring haar voltooiing begint; dat ge nu ...

  20. Die Kunst des Scheiterns

    DEFF Research Database (Denmark)

    Juul, Jesper

    2014-01-01

    Menschen haben von Kindesbeinen an das Verlangen, Erfolge zu erzielen und Kompetenz zu erreichen. Computerspieler entscheiden sich jedoch fortlaufend für eine Aktivität, die oft und wiederholt zum Verlieren führen muss und ein taubes Gefühl der Unfähigkeit erzeugt. Im Kino, im Theatersaal und bei...

  1. Deutschland und die Araber

    OpenAIRE

    Maguid Saad Salamah

    2014-01-01

    Die traditionellen Freundschaftsbande zwischen Deutschen und Arabern haben sich in den letzten Jahren fester geschlossen, bis sie eine aktive Teilnahme seitens Deutschlands bei der Industrialiserung der arabischen Länder und der Gewährung jeder gewünschten technischen oder kulturellen Hilfe wurden. 

  2. When Somebody Dies

    Science.gov (United States)

    ... who we are. No one really knows what happens to a person's soul after death. There are many different beliefs about that, and it's best to talk with your family to find out what they believe happens after our bodies die. Then you can decide ...

  3. Tegnologie en die mens

    African Journals Online (AJOL)

    Hellriegel en Slocum vat egter verskeie teoriee saam wanneer hulle se daar 'n indiwiduele en organisasie weerstandsproses is en dat organi- satoriese verandering slegs teweeg gebring kan word indien bestuur hierdie prosesse kan her- ken en verstaan. Die indiwiduele weerstands- proses word gekenmerk deur kragte ...

  4. Die skool en die onderwyser as faktore in die geestesgesondheid van die kind*

    Directory of Open Access Journals (Sweden)

    B. C. Schutte

    1961-03-01

    Full Text Available Ons hou geestesgesondheidsweke, stig beroepsentrums, samel geld in om mense wat geestelik siek is te genees, klae oor die tekort aan psigiaters, kliniese sielkundiges, bedryfsielkundiges, voorligters, skoolpsigoloë,ens. ’n Karige kwarteeu gelede het ons aan al hierdie dinge slegs akademiese aandag gewy. In hierdie kursus wordverskeie tipes kinders bespreek en geleer hoe om hulle probleme te benader.

  5. Die Kosmologie der Griechen.

    Science.gov (United States)

    Mittelstraß, J.

    Contents: 1. Mythische Eier. 2. Thales-Welten. 3. "Alles ist voller Götter". 4. Griechische Astronomie. 5. "Rettung der Phänomene". 6. Aristotelische Kosmololgie. 7. Aristoteles-Welt und Platon-Welt. 8. Noch einmal: die Göttlichkeit der Welt. 9. Griechischer Idealismus.

  6. Dying at home

    Science.gov (United States)

    Kiyanda, Brigitte Gagnon; Dechêne, Geneviève; Marchand, Robert

    2015-01-01

    Abstract Objective To demonstrate that it is possible for a team of palliative care nurses in an urban centre to care for more than 50% of their terminally ill patients at home until they die, and that medical care delivered in the home is a determining factor in death at home versus death in a hospital. Design Analysis of place of death of terminally ill patients who died in 2012 and 2013 (N = 212) and who had been cared for by palliative care nurses, by type of medical care. Setting The centre local de services communautaires (CLSC) in Verdun, Que, an urban neighbourhood in southwest Montreal. Participants A total of 212 terminally ill patients. Main outcome measures Rate of deaths at home. Results Of the 212 patients cared for at home by palliative care nurses, 56.6% died at home; 62.6% received medical home care from CLSC physicians, compared with 5.0% who did not receive medical home care from any physician. Conclusion Combined with a straightforward restructuring of the nursing care delivered by CLSCs, development of medical services delivered in the home would enable the more than 50% of terminally ill patients in Quebec who are cared for by CLSCs to die at home—something that most of them wish for. PMID:25873716

  7. Wat wil die apologetiek?

    Directory of Open Access Journals (Sweden)

    P. W. Buys

    1980-03-01

    Full Text Available Oor die Apologetiek bestaan daar veel verwarring. “Men krijgt het gevoel, alsof men de hand gestoken heeft in een wespennest. Geen enkel vak der godgeleerdheid toont zulk een beeld van volslagen wanorde als dit” (Hepp, 1922, p. 16.

  8. Die skeppingsmites as simbole van psigiese prosesse

    African Journals Online (AJOL)

    dig aangedui met 'n tekening van die Uroboros, die slang wat sy eie stert eet. Die antieke kaart word verder versier met tekeninge van diere, monsters en demoniese figure. Vier koppe met monde wat die wind uit die vier windrigtings blaas, word in die hoeke van die kaart geteken. Die Uroboros, diere, monsters en demone ...

  9. DIE SUID-AFRIKAANSE KAPELAANSDIENS (SAKD) EN ...

    African Journals Online (AJOL)

    het. Die strategiese oorname van die Kaap deur Brittanje in 1806 het hierdie band bekragtig. Die Kerk van Engeland (Anglikaanse Kerk) het in 1534 as staatskerk van die Rooms-Katolieke Kerk afgeskei ná 'n twis tussen die Britse koning en die pous. Die Britse monarg is as konstitusionele hoof van die Anglikaanse Kerk ...

  10. Modelle in die onderrig van fisika

    Directory of Open Access Journals (Sweden)

    J. J. A. Smit

    1998-07-01

    Full Text Available Die rol van modelle in die onderrig van fisika is sedert die vroeë tagtigerjare erken. In die onderrig word die absent op die kwantitaiewe aspekte van die vak geplaas, terwyl die kwatitatiewe aspekte min aandag kry.

  11. Die ontwikkeling van 'n instrument vir die meting van die konstruk sielkundige diepte-orientasie

    Directory of Open Access Journals (Sweden)

    L. C. De Jager

    1981-11-01

    Full Text Available The development of an instrument (the RD-Depth Questionnaire, Form B for measuring the construct psychological depth orientation is discussed. Results show that the questionnaire has satisfactory internal consistency and that the items of the questionnaire in general measure the same characteristic. Further research is needed to refine and improve the questionnaire until it meets all the psychometric requirements of a good measuring instrument.OpsommingDie ontwikkeling van 'n instrument (die RD-Diepte Vraelys, Vorm B vir die meting van die konstruk sielkundige diepteoriëntasie word bespreek. Resultate dui daarop dat die vraelys bevredigende interne bestendigheid toon en dat die items van die vraelys oor die algemeen dieselfde eienskap meet. Verdere navorsing word egter nog vereis om die vraelys te verfyn en te verbeter sodat dit aan al die psigometriese vereistes van 'n goeie meetinstrument sal voldoen.

  12. A protection type of flow-guided extrusion die for semi-hollow Al-Profiles

    Science.gov (United States)

    Deng, Rurong; Yun, Peng; Huang, Cuiting; Huang, Xuemei

    2017-09-01

    A new die structure for the semi-hollow Al-profiles was presented. Through a practical example, the die structure named protection type of flow-guided die was introduced. The composition of the structure and the selection of structure parameters were analyzed in detail. And the method of checking the die strength was introduced. The characteristics of the new structure were simple and easy to process. The practical application shows that the die structure can enhance the strength and prolong the life of the die. It is worth promoting. The purpose is to extend the experience and the new die structure, Provide reliable and valid reference data to the designers.

  13. Wall Art

    Science.gov (United States)

    McGinley, Connie Q.

    2004-01-01

    The author of this article, an art teacher at Monarch High School in Louisville, Colorado, describes how her experience teaching in a new school presented an exciting visual challenge for an art teacher--monotonous brick walls just waiting for decoration. This school experienced only minimal instances of graffiti, but as an art teacher, she did…

  14. The ‘full sleeve’ application in the horizontal cold-chamber machine for pressure die casting of aluminium alloys

    Directory of Open Access Journals (Sweden)

    Z. Konopka

    2008-04-01

    Full Text Available The ‘full sleeve’ construction has been designed and accomplished in the horizontal cold-chamber pressure die casting machine. Main part of this solution is a counter plunger placed in a movable die half which allows for full filling of the shot sleeve and precisely fixes the metal quantity needed for casting. The purpose of this new construction solution is mainly the reduction of the casting porosity caused by air entrapment and the improvement of both castability and accuracy of the die cavity reproduction. For such a redesigned machine there have been performed examinations consisting in pressure casting of AlSi9Cu alloy (EN AC-46000 at varying plunger velocity in the second stage of injection and varying intensification pressure. The alloy castability (the die filling ability has been measured for each parameter setting. For the purpose of comparison, similar measurements have been performed also for the conventional system without a counter plunger. The castability examination has been done by means of a specially designed die with an impression of a trial casting of variable wall thickness. The experiments have been held according to the assumed factor design 22, what allowed for determining the mathematical models describing the influence of die filling parameters on the castability and the die cavity reproduction level. Both alternatives of the experiment confirmed the positive influence of plunger velocity and intensification pressure increase on the improvement of castability, the measure of the latter being the filled length of the impression. Applying of the new ‘full sleeve’ solution has improved castability for each experiment by about 20% as compared with conventional alternative. Castability in the ‘full sleeve’ system has been increased even for low values of plunger velocity and intensification pressure. For both alternative systems the influence of plunger velocity has been found, as an average, by four times

  15. Failures of dies for die-casting of aluminium alloys

    Directory of Open Access Journals (Sweden)

    Kosec, B.

    2008-01-01

    Full Text Available Die-casting dies for casting of aluminum alloys fail because of a great number of different and simultaneously operating factors. Material selection, die design, and thermal stress fatigue generated by the cyclic working process (heat checking, as well as to low and inhomogeneous initial die temperature contribute to the failures and cracks formation on/in dies for die-casting of aluminium alloys. In the frame of the presented investigation work the intensity and homogeneity of the temperature fields on the working surface of the testing die were checked through thermographic measurements, and failures and cracks on the working surface of the die were analysed with non-destructive metallographic examination methods.

  16. Die betrokkenheid van die Nederduitsch Hervormde Kerk by ...

    African Journals Online (AJOL)

    Bybelse geskiedenis - Ou Testament, Bybelvertaling, Skrifverklaring (metodo- logie, Ou en Nuwe Testament), Teologie (Ou en Nuwe Testament). • Bybelkunde 310. Bybelse geskiedenis - Ou Testament, kultuurhistories agtergrond van die Bybel, literatuursoorte en inleiding, hermeneutiek, Skrifverklaring en Teologie van die.

  17. Die wonder van Afrikaans: Totius en die bybelvertalers*

    Directory of Open Access Journals (Sweden)

    G. Dekker

    1959-03-01

    Full Text Available In die kort tydjie tot my beskikking kan ek slegs probeer om oor hierdie heel belangrike onderwerp, eintlik die sentrale onderwerp, van ons taalfees, enkele essensiële aspekte kortliks aan te raak.

  18. Modeling the Mechanical Performance of Die Casting Dies

    Energy Technology Data Exchange (ETDEWEB)

    R. Allen Miller

    2004-02-27

    The following report covers work performed at Ohio State on modeling the mechanical performance of dies. The focus of the project was development and particularly verification of finite element techniques used to model and predict displacements and stresses in die casting dies. The work entails a major case study performed with and industrial partner on a production die and laboratory experiments performed at Ohio State.

  19. Die eerste vertalings van die Heidelbergse Kategismus in Afrikaans

    Directory of Open Access Journals (Sweden)

    Dolf Britz

    2013-06-01

    Full Text Available Hierdie artikel diep die geskiedenis van die eerste vertalings van die Heidelbergse Kategismus in Afrikaans uit die primêre bronne op. Die Belydenisskrifte (insluitende die Kategismus is gedurende die eerste helfte van die twintigste eeu in Afrikaans oorgesit tydens ’n vertalingsprojek waaraan die drie Hollands-Afrikaanse Kerke van gereformeerde belydenis saamgewerk het. In hierdie geskiedenis kan drie fases onderskei word. Die aanvanklike fase (1913–1927 eindig in die gemeenskaplike oortuiging dat die werk aan die Bybelvertalers oorgelaat moet word. Daarmee is beslag gegee aan ’n tweede fase (1927–1936. In 1936 is die vertaling voltooi en in ’n Formulierboek vir die ‘drie Hollandse Kerke’ gepubliseer. Die derde fase (1936–1950 behels die ontvangs van die Formulierboek. Slegs die Gereformeerde Kerk in Suid-Afrika (GKSA het die vertaling amptelik aanvaar, omdat dit op die Nederlandse teksuitgawe berus het wat F.L. Rutgers in samewerking met Herman Bavinck en Abraham Kuyper in 1897 vir die Gereformeerde Kerken in Nederland besorg het. Die ander twee Kerke het aansluiting gevind by hulle eie negentiende-eeuse tekstradisie. In 1945 het die Nederduitsch Hervormde Kerk van Afrika (NHK ’n eie vertaling asBelydenisskrifte, gebede en formuliere die lig laat sien. Hierdie vertaling is gebaseer op die (Nederlandse krities bewerkte teksuitgawe wat Van Toornenbergen in sy boek, De symbolische schriften (1895, opgeneem het. Die Nederduitse Gereformeerde Kerk (NGK het in 1950 sy vertaling van die Belydenisskrifte en Formuliere voltooi. Dit is hoofsaaklik geanker in die (Nederlandse tekste van die Formulierboek der N.G. Kerk in Z. Afrika (1907, wat op sy beurt ook in ooreenstemming was met die tekstradisie waarmee Van Toornenbergen gewerk het. This article traces the history of the first Afrikaans translations of the Heidelberg Catechism from primary sources. In a mutual project the three Dutch-Afrikaans and reformed churches translated their

  20. Dying Is Unexpectedly Positive.

    Science.gov (United States)

    Goranson, Amelia; Ritter, Ryan S; Waytz, Adam; Norton, Michael I; Gray, Kurt

    2017-07-01

    In people's imagination, dying seems dreadful; however, these perceptions may not reflect reality. In two studies, we compared the affective experience of people facing imminent death with that of people imagining imminent death. Study 1 revealed that blog posts of near-death patients with cancer and amyotrophic lateral sclerosis were more positive and less negative than the simulated blog posts of nonpatients-and also that the patients' blog posts became more positive as death neared. Study 2 revealed that the last words of death-row inmates were more positive and less negative than the simulated last words of noninmates-and also that these last words were less negative than poetry written by death-row inmates. Together, these results suggest that the experience of dying-even because of terminal illness or execution-may be more pleasant than one imagines.

  1. Film Presentation: Die Urknallmaschine

    CERN Multimedia

    Carolyn Lee

    2010-01-01

    Die Urknallmaschine, an Austrian film by Gerd Baldauf, narrated by Norbert Frischauf (Alpha Österreich - ORF, 2009).  In CERN’s gigantic complex particles are accelerated to almost the speed of light, brought to collision and made to divide into even smaller particles. Public opinion of CERN’s research is also divided. Sceptics fear that black holes may be created. Might the goal to study the origin of the world lead to its destruction? The Austrian researcher Norbert Frischauf worked at CERN for many years. With his guidance it is possible to explore the world’s largest research centre, get a glimpse of the fascinating work the scientists do there and take a crash course in particle physics. Die Urknallmaschine will be presented on Friday, 25 June from 13:00 to 14:00 in the Main Auditorium. Language: German

  2. Die waarde en uitdagings van diensleer vir tolkopleiding: die ...

    African Journals Online (AJOL)

    Studente behoort op so ʼn wyse na te dink oor die diensleeraktiwiteit dat hulle verdere begrip van en groter waardering vir die dissipline kry, sowel as ʼn verhoogde bewustheid van persoonlike eiewaarde en verantwoordelikheid teenoor die burgerlike samelewing ontwikkel (Bringle en Hatcher 1995:12). Teen hierdie ...

  3. op die veranderinge wat in die onderrig van Afrikaans plaasgevind ...

    African Journals Online (AJOL)

    8 Apr 2016 ... gaan dink; “E toep”, wat toon hoe die rekenaar prakties in die klaskamer ge bruik kan word en “Toep”, wat praktiese toepassings van kernkonsepte in die klaskamer illustreer. Voorts word in elke hoofstuk vetgedrukte kernkonsepte; interessante en bruikbare tekste en uit gebreide oefeninge verskaf.

  4. Die kairos van die New Age: 'n Kultuurhistoriese skets

    African Journals Online (AJOL)

    prophetic dreams, etc., are merely manifestations of the activity of those finer sen ses. Unreliable at first, like the infant's vision, they can be developed and trained, until the subtler worlds stand as an open book before the man.' Die ontvouing van die mens se kragte geskied volgens die teosowe stadig en geleidelik. Daarom ...

  5. 'n Verkenning van die soorte vennootskappe in die Amerikaanse reg ...

    African Journals Online (AJOL)

    In die Amerikaanse literatuur word talle verwysings gevind na die vennootskap in mynbou ("mining partnership"), familievennootskap ("family partnership", vennootskap in vaste eiendom ("partnership in real estate") en vennootskap vir boerdery ("farming partnership"). Hierdie onderskeiding is primer gebaseer op die tipe ...

  6. Die Leben Einsteins eine Reise durch die Geschichte der Physik

    CERN Document Server

    Fiami

    2005-01-01

    Jeder kennt die Namen Einstein, Newton oder Galilei. aber was weiss man über sie? Hier ein Porträt Einsteins anhand von sechs Meilensteinen aus der Geschichte der Physik. Einstein tritt auf als Protagonist in verschiedenen Epochen und bei verschiedenen Entdeckungen, die die Welt verändert haben.

  7. voorveronderstellings in die hantering van die verhouding tussen ou ...

    African Journals Online (AJOL)

    1986. Teologie as kritiese geloofsverantwoording. Teorievorming in die sistematiese teologie. Pretoria: RGN. VAN ZYL A H. 1970. Die verhouding van die Ou en Nuwe Testament. In: W.D. Jonker, J.H.. Roberts & A.H. van Zyl (reds.), Hermeneutica. Erebundel aangebied aan Prof. E.P.. Groenewald by geleentheid van sy 65e ...

  8. 'n Vergelyking tussen die teologie van die Nederlandse ...

    African Journals Online (AJOL)

    'Denken wij niet te weinig aan de engelen?' Miskien moet ons ook vra: Denken wij niet te weinig aan de hemelvaart?' veral ^ 'n mens sien watter ryke en troosryke betekenis die Heidelbergse Kategismus daaraan gee. Kort en kragtig stel die. Heidelbergse Kategismus die feit van Jesus Christus sc hemelvaart, maar voeg.

  9. N HERSIENING VAN DIE AFRIKAANSE VERTALING VAN DIE ...

    African Journals Online (AJOL)

    Test

    so^hoi) was nie dog sterrewiggelaars. EDGAR J. GooDPSEBD stel inderdaad ook voor om magoi in die engels te vertaal met "astro logers"^). Om die bekende wyses uit die Ooste nou te vervang met,. „sterre-wiggelaars" of selfs „astroloë" skyn ...

  10. n Oorsig van die huidige stand van navorsing oor die ...

    African Journals Online (AJOL)

    Test

    7 Jun 2011 ... duidelike beskrywing van die opponente nie (kyk Schmid. 2002; Van der Merwe 2007 vir volledige besprekings). In 'n poging om die opponente te identifiseer, word die direkte opmerkings wat wél oor hulle gemaak word met sekere indirekte opmerkings gekombineer ten einde 'n volledige prentjie te skets.

  11. Kweekskool teenoor teologiese fakulteit: Die ervaring van die ...

    African Journals Online (AJOL)

    office, who have enjoyed the benefits of a liberal education' (Bullock 1955:18). Die predikant moet 'an educated man' wees (Bullock 1955:67). Aan die ...... Crafford, D 1982. Aan God die dank. Pretoria: NG Kerk Uitgewers. De Graaf, W 1955. Een monument der afscheiding. Kampen: Kok. 90. HTS SO/I A 2 (1994) ...

  12. Die gebruik van Afrikaans vir die notulering van hofverrigtinge ...

    African Journals Online (AJOL)

    Daar word tans nog van beide Afrikaans en Engels vir die notulering van verrigtinge in Suid-Afrikaanse howe gebruik gemaak. Sowel regeringswoordvoerders as die Minister van Justisie het egter te kenne gegee dat 'n eentalige Engelse bedeling ingevoer mag word. Hierdie artikel ontleed die saak vir en teen so 'n ...

  13. die ontstaan en ontwikkeling van die kwartiermeester-generaal

    African Journals Online (AJOL)

    1 Okt 1976 ... (insluitende teg- niese voorrade, voertuie en ammunisie) be- hartig. Dit het die organisasie en werking van krygsbehoeftedepots ingesluit. Daar was geen tegniese voorraad depots nie. (ii) Die SA Intendans onder KMG se beheer het die kommissariaat en transportfunksies ver- rig, insluitende brandstof en ...

  14. duele verse sowel as die somtotaal die leser

    African Journals Online (AJOL)

    27 Jan 2006 ... byt word aan manuskripte van ingesetenes in hierdie genre nie. Maar nog verblydender is die gehalte van die verse waarmee Gil- bert Gibson met Boomplaats sy formele in- trede tot die Afrikaanse poësie maak (hoe- wel hy reeds in Nuwe Stemme 2 – Tafelberg,. 2001 – gepubliseer het), want vir 'n debu-.

  15. Die aanspraak op Goddelike steun in 'n konfliksituasie volgens die ...

    African Journals Online (AJOL)

    Dit geld veral met betrekking tot goddelike 'eienskappe', waarvan ons hipoteties moet afsien, want die tekste self noem dit in concreto net binne konkrete relasies tussen God en mense. Verder sal ons die hermeneutiese benadering, wat ons die analogie-model genoem het, nie sonder baie goeie redes kan veronderstel nie ...

  16. Die ontwikkeling van menslike potensiaal in die Republiek van Suid ...

    African Journals Online (AJOL)

    Erna Kinsey

    :93). Die “Poverty Index Report” van die huidige rege- ring dui aan dat nagenoeg 50% van alle Suid-Afrikaners in armoede leef. Meer as 70% van alle armes word in die plattelandse gebiede aangetref en 61% van alle swartes is armes (Paton ...

  17. Structure of Water Mist Stream and its Impact on Cooling Efficiency of Casting Die

    Directory of Open Access Journals (Sweden)

    R. Władysiak

    2012-04-01

    Full Text Available The work is a continuation of research on the use water mist cooling in order to increase efficiency of die-casting aluminum alloys. The paper presents results of research and analysis process, spraying water and generated a stream of water mist, the effect of the type of nozzle, the nozzle size and shape of the emitting of the water mist on the wall surface of casting die on the microstructure and geometry of water mist stream and cooling efficiency. Tests were used to perform high-speed camera to record video in the visible and infrared camera. Results were used to develop a computerized image analysis and statistical analysis. The study showed that there are statistical relationships between water and air flow and geometry of the nozzle and nozzle emitting a stream of microstructure parameters of water mist and heat the incoming stream. These relationships are described mathematical models that allow you to control the generating of adequate stream of water mist and a further consequence, the cooling efficiency of casting die.

  18. Die verhoudíng 'kerk en volk' in die jare 1835-1900 in die Oorvaalse ...

    African Journals Online (AJOL)

    daaruit voongevloei het, het die verhouding van die kerk en die volk verander, óók omdat die inhoude van dié begrippe verander het. As op die veranderinge gelet word, is dit nogal opvallend dat in die situasie self nie altyd skerp onderskei is tussen kerk en volk nie en dat die onderskeidings dikwels nogal naief hanteer is.

  19. Studie van die letterkunde: Waarom?

    OpenAIRE

    D. H. Steenberg

    1981-01-01

    Sy woorde laat super-novae uitbars, blink, blink en straal deur ringe en lig-ure. Maar die blink die word deur ons gesien: anders nooit en nooit as blink geweet nie. (NP van Wyk Louw: Groot Ode, Tristia)

  20. Verrekening van die kragveld van die verbond in die inkleding van die kommunikatiewe driehoeksverhouding tussen teks, hoorder en prediker

    Directory of Open Access Journals (Sweden)

    Friedrich W. de Wet

    2012-09-01

    Full Text Available In hierdie artikel word die kommunikatiewe driehoeksverhouding tussen die Bybelse teks, die hoorders en die prediker homileties verken. Die probleemstelling waarmee gewerk word handel oor potensiële versteurings wat kan plaasvind in hierdie driehoeksverhouding wanneer die hoorders en die prediker in hulle menslike beperktheid in verbinding gebring word met die ewige Woord van God soos dit in die Bybelse teks na vore kom. In die loop van die artikel word die volgende aspekte verken: ’n Ideale tipering van die verhouding tussen die teks, hoorders en prediker waarin al drie faktore ’n regmatige plek het; die maniere waarop die kommunikatiewe driehoek in die spanningsveld tussen teks, hoorders en prediker kan skeeftrek; en pneumatologiese verankering van die kommunikatiewe driehoek in die kragveld van die verbondsruimte, waarin Jesus Christus versoenend (integrerend teenwoordig is. Die gevolgtrekking waartoe gekom word, is dat die prediker in die kragveld van die verbond in staat gestel word om getrou te bly aan die teks (waarin God aan die Woord kom, aan die hoorders (as mededeelgenote in die genade van God sowel as – in missionêre konteks – mense wat geroep word om deelgenote in hierdie genade te word en aan hom- of haarself (as nuwe mens in Christus sonder dat die verbintenis aan een element in die  kommunikatiewe driehoek die verbintenis aan die ander versteur of laat disintegreer.Reckoning with the force field of the covenant in aligning the communicative triangle between text, listener and preacher. In this article the communicative triangular relationship between the Biblical text, the listeners and the preacher is reflected upon from a homiletic point of view. The problem statement deals with potential distortions in this triangular relationship when the listeners and preacher (in their human finitude are brought into contact with the eternal Word of God as it proceeds from the Biblical text. In the course of the article the

  1. Wall Layers

    Science.gov (United States)

    1992-01-14

    Sydney, Australia. December 6, 1990. Lumley, J. L. A dynamical-systems-theory approach to the wall region. Environmental Engineering Laboratory, CSIRO...Nonlinear Science. Holmes, P. Editor in Chief, Nonlinear Scinece Today. Holmes, P. Reviewer for Physica D, J. Sound Vib., J. Phys., Q. Appl. Math, Phys...Spring, 1994; Organizing committee member. Holmes, P. Editorial Board Member: Archive for Rational Mechanics and Analysis; Journal of Nonlinear Scinece

  2. CLIMBING WALL

    CERN Multimedia

    1999-01-01

    The FIRE AND RESCUE Group of TIS Commission informs that the climbing wall in the yard of the Fire-fighters Station, is intended for the sole use of the members of that service, and recalls that access to this installation is forbidden for safety reasons to all persons not belonging to the Service.CERN accepts no liability for damage or injury suffered as a result of failure to comply with this interdiction.TIS/DI

  3. "Einfach anders als die anderen"

    OpenAIRE

    Müller, Stefanie

    2007-01-01

    Stefanie Müller erfasst in ihrem Text die Biographie von Anna, einer jungen Frau, die von ihrer Zeit vor, während und nach dem Verlassen der Gemeinschaft der Zeugen Jehovas berichtet. Der Essay ist halbfiktional und entstand aus verschiedenen Interviews mit ehemaligen Zeugen Jehovas. Die Autorin fasst gemeinsame Aussagen der Akteure zusammen und kreiert eine fiktionale Person dessen Leben vor und nach den Zeugen Jehovas geschildert wird. Die Fragestellung ist diskursiv in den Text integriert ...

  4. Precision die design by the die expansion method

    CERN Document Server

    Ibhadode, A O Akii

    2009-01-01

    This book presents a new method for the design of the precision dies used in cold-forging, extrusion and drawing processes. The method is based upon die expansion, and attempts to provide a clear-cut theoretical basis for the selection of critical die dimensions for this group of precision dies when the tolerance on product diameter (or thickness) is specified. It also presents a procedure for selecting the minimum-production-cost die from among a set of design alternatives. The mathematical content of the book is relatively simple and will present no difficulty to those who have taken basic c

  5. Narratiwiteit en die Ou Testament

    African Journals Online (AJOL)

    kosmologie wat die Ou-Testamentiese narratiewe ten grondslag lê, van mitologiese samelewings verskil. Die belangrikste verskil is daarin gelee dat daar in die Ou-Testamentiese narratiewe met 'n lineêre geskiedsiening en monoteisme in kontras met ...

  6. IRAN IN DIE INTERNASIONALE MAGSTRYD

    African Journals Online (AJOL)

    which enjoy significant support in the workforce of the manufacturing and oil industries. Inleiding. The comparison of force is not only ... suide, Afganistan en Pakistan in die ooste be}:lrens. Iran vorm tans 'n buffertussen die ..... sive, militant on oil prices and conservationist in production policy. Ten einde Iran se'posisle in die ...

  7. DIE AANWENDING VAN VOEDSELHULPBRONNE VIR ...

    African Journals Online (AJOL)

    (b) Grane en proteibne moet verkieslik aangewend word in die rantsoene van spesies wat dit meer doeltreffend kan benut te wete melkkoeie en enkelmaagdiere. Namate die hoender en vark meer direk met die mens vir hierdie voedsels gaan begin nreeding, sal hulle outomaties begin terugtree, in orde van belangrikheid.

  8. DIE PROBLEMATIEK VAN MILITERE OPLEIDING

    African Journals Online (AJOL)

    bevolkingsgroepe, bestaan daar ook verskeie subkulture binne die SAW. So vorm elke weer- magsdeel 'n eie unieke subkultuur wat opgebou is deur kollektiewe ervaring en bestaan uit ele- mente van onderlinge verhoudinge en eensge- sindheid (Hoof van die SAW: KINGSROW-ver- slag 1987: F-5). Die weermagsdele.

  9. DIE LEWE VAN JOAO ALBASINI

    African Journals Online (AJOL)

    noord van Lourenco Marques, waar hy as jagter en ivoorhandelaar 'n bestaan gemaak het. In sy hoedanigheid as handelaar en jagter was hy oak in die posisie am latere jare die Voortrekkers van lewensmiddele te voorsien. In 1840 besluit hy am verder die binneland in te trek op soek na nuwe jagvelde. Gedurende sy.

  10. Die Vorritzungen der Etruskischen Grabmalerei

    NARCIS (Netherlands)

    1930-01-01

    Die vorliegende Untersuchung will dem Problem der etruskischen Grabmaleri im ganzen dienen. Es scheint mir, als ob die Vernachlässigung der Grabgemälde in Etrurien, die zu einem bedeutenden Teil noch immer sehr gut erhalten sind, einen bestimmten nachweisbaren Grund hat. Obwohl wir hier eine

  11. DIE SAGD - SY ONTSTAAN EN ONTWIKKELING

    African Journals Online (AJOL)

    31 Okt 1977 ... Aktiewe Burgermag en 'n Kadetorganisasie, Die totstandkoming van die mediese diens is aan It- kol M,C, Roland (onder-sekretaris van Verdedi- ging) opgedra,. Die stigting van die SAGO is vergemaklik van- wee die feit dat daar reeds 3 mediese korpse (in. Transvaal, Natal en die Kaap) in die Unie was,.

  12. Rare abdominal wall hernias in South Sudan

    African Journals Online (AJOL)

    If no prosthesis is used,. Rare abdominal wall hernias in South Sudan. This article is dedicated to the memory of Professor Giuseppe Meo who died in January and who initiated, and devoted many years to, the surgical missions in South Sudan (see obituary page 46). Elena Codognottoa, alberto Kissa, Giuseppe Meoa, ...

  13. Die onkunde van die Jode en hulle verwerping van die evangelie

    African Journals Online (AJOL)

    kontras uitgewys tussen die misdaad van die Jode en die doel van God wat in vers 18 uitgedruk word (Metzger ... ens (1978: 28) dat ons ons nie kan vrypleit deur ons te beroep op die verborge raad van God nie - ons ... volk mislei het deur hulle vir hulle eie doel teen Jesus te gebruik. SÓ gesien, kom Lukas 24: 20 tot sy reg, ...

  14. Sal die ‘ewolusie’ vanaf biologie na lewenswetenskappe ‘uitsterwing’ van die vakgebied voorkom?

    Directory of Open Access Journals (Sweden)

    Johanna G. Ferreira

    2012-03-01

    Full Text Available In hierdie artikel word die wysiging van die skoolvak van ‘biologie’ na ‘lewenswetenskappe’ bespreek, asook die gepaardgaande en verwagte implikasies van die verandering. Die vraag word gestel of die beoogde wysiging wel noemenswaardig is en of dit enigsins ‘n verskil aan die dalende belangstelling in die lewenswetenskappe op tersiêre vlak sal maak. Die wysigings in die nuwe kurrikula verhoog die relevansie van die vakinhoud vir leerders en vir die gemeenskap, maar sekere kwessies kry nie aandag nie. Voorstelle word gemaak om die kurrikulum te wysig en onderrigmetodes aan te pas om die nodige vaardighede by leerders te vestig.

  15. Dying with dignity.

    Science.gov (United States)

    Madan, T N

    1992-08-01

    Death is a theme of central importance in all cultures, but the manner in which it is interpreted varies from society to society. Even so, traditional cultures, including Christian, Hindu and Jain religious traditions, exhibited a positive attitude to death and did not look upon it in a dualistic framework of good vs bad, or desirable vs undesirable. Nor was pessimism the dominant mood in their thinking about death itself. A fundamental paradigm shift occurred in the West in the eighteenth century when death was desacralized and transformed into a secular event amenable to human manipulation. From those early beginnings, dying and death have been thoroughly medicalized and brought under the purview of high technology in the twentieth century. Once death is seen as a problem for professional management, the hospital displaces the home, and specialists with different kinds and degrees of expertise take over from the family. Everyday speech and the religious idiom yield place to medical jargon. The subject (an ageing, sick or dying person) becomes the object of this make-believe yet real world. As the object of others' professional control, he or she loses the freedom of self-assessment, expression and choice. Or, he or she may be expected to choose when no longer able to do so. Thus, not only freedom but dignity also is lost, and lawyers join doctors in crisis manipulation and perpetuation. Although the modern medical culture has originated in the West, it has gradually spread to all parts of the world, subjugating other kinds of medical knowledge and other attitudes to dying and death.(ABSTRACT TRUNCATED AT 250 WORDS)

  16. Die effek van "oefening op verskillende tye van die dag" op die ...

    African Journals Online (AJOL)

    Die effek van "oefening op verskillende tye van die dag" op die bloedglukosevlakke van Tipe 2 diabete. ... South African Journal for Research in Sport, Physical Education and Recreation. Journal Home ... This paper reports on the effect of the time of the day of exercise on the blood glucose levels of Type 2 diabetic patients.

  17. die bou van die st aa tsartilleriekaserne, potgieterstraa t, pretoria: die ...

    African Journals Online (AJOL)

    van die Republiek, op. 12.4.1877, het die korps verdwyn en het 'n Britse militere kamp sy verskyning aan die suidekant ... in 'n voormalige Britse militere kamp, aan Potgie- terstraat gehuisves, op dieselfde plek waar tans ... drilplein (zynde het hart van de Scheiding- straat), en met den achtergevel 200 voet uit de verlengde ...

  18. Die ideaal van die spreker in die satiriese gedig: M.M. Walters

    Directory of Open Access Journals (Sweden)

    S. M. Cameron

    1980-05-01

    Full Text Available Wanneer van die satirikus gepraat word, word eintlik die spreker in die satiriese gedig veronderstel. “For the Muse ought always to be our reminder that it is not the author as man who casts these shadows on our printed page, but the author as poet” (Mack, 1971:193.

  19. Die konvensie van Sandrivier as die afsluiting van die Groot Trek

    African Journals Online (AJOL)

    van Xhosastropers en ander rowers bly; wantroue in die regering se verdraagsame en onrealistiese houding teenoor die grensstamme. Daar was wantroue in die regering se bereidwilligheid en vermoe om hulle te beskerm of hulle besittings te waarborg, wat onvoldoende troepe vir hulle verdediging beskikbaar gestel het, ...

  20. Is die ortodoksie se verstaan van die sondeval belemmerend vir die gesprek tussen teologie en natuurwetenskap?

    Directory of Open Access Journals (Sweden)

    Johan Buitendag

    2012-11-01

    Full Text Available In hierdie artikel is betoog dat die Gereformeerde Ortodoksie se begrip van die sondeval ’n  belemmering  was  vir  die  gesprek  tussen  teologie  en  natuurwetenskap.  Die  rede hiervoor was dat dit ten eerste ’n bepaalde verstaan van liniêre tyd nahou en ten tweede dat dit ’n bonatuurlike ingryp veronderstel het. Albei hierdie aspekte het die debat onnodig problematiseer. Die argument is ontwikkel deur eerstens die probleem te definieer, gevolg deur ’n uiteensetting van die standpunte van Augustinus en Calvyn onderskeidelik oor die sondeval. As ’n heuristiese sleutel is die konsepte van infralapsarisme en supralapsarisme aangewend om die tema te ontleed. Die artikel is afgesluit met die oortuiging dat die imago Dei ’n beliggaamde menslike persoon is wat biologies in die geskiedenis in terme van selfbewussyn en morele verantwoordelikheid ontluik het. Is the Orthodoxy’s notion of the Fall inhibitory for the dialogue between theology and science? In this article it was argued that the Reformed Orthodoxy’s interpretation of the Fall had become an impediment in the dialogue between theology and science. The reason was that it assumed firstly a specific understanding of linear time and secondly a metaphysical intervention. Both events were unnecessarily problematising the debate. The argument was deployed by stating the problem, followed by an exposition of the views of Augustine and Calvin on the Fall. As a heuristic key, the concepts of infralapsarism and supralapsarism were applied respectively to analyse the topic. The article concluded with the conviction that the imago Dei is an embodied human person that had biologically emerged in history as a center of self-awareness, and moral responsibility.

  1. Die verband tussen lokus van beheer en die werks prestasie van swart bemarkers in die lewensversekeringsbedryf

    Directory of Open Access Journals (Sweden)

    E. L. Coetzer

    1997-06-01

    Full Text Available The relationship between locus of control and the work performance of black marketers in the life assurance industry. The aim of the study was to establish the relationship between locus of control and the work performance of black marketers in the life assurance industry. These constructs were selected by virtue of the lack of empirical research regarding the assumed relationship between them. The Locus of Control Scale of Schepers (1995 was used for measuring locus of control. Work performance was measured by the commission earned per month by the marketer, the number of policies generated by the marketer, as well as the percentage of lapsed policies. The relevant measurements were obtained in respect of a sample of 149 black marketing personnel. The results indicated a modest but statistically significant relationship between external locus of control and the work performance of black marketers. Opsomming Die doel van die studie was om die verband tussen lokus van beheer en die werksprestasie van swart bemarkers in die lewensversekeringsbedryf te bepaal. Hierdie konstrukte is gekies op grond van die gebrek aan empiriese navorsing rakende die veronderstelde verband tussen genoemde konstrukte. Die Lokus van Beheer-vraelys van Schepers (1995 is in die meting van lokus van beheer gebruik. Werksprestasie is aan die hand van kommissie per maand verdien, aantal polisse gegenereer deur 'n bemarker en die persentasie vervalde polisse, gemeet. Die tersaaklike metinge is verkry ten opsigte van 'n steekproef van 149 swart bemarkers. Die resultate toon 'n klein, dog statisties beduidende verband tussen eksterne lokus van beheer en die werksprestasie van swart bemarkers in die lewensversekeringsbedryf.

  2. Optimizing {sup 18}F-FDG PET/CT imaging of vessel wall inflammation: the impact of {sup 18}F-FDG circulation time, injected dose, uptake parameters, and fasting blood glucose levels

    Energy Technology Data Exchange (ETDEWEB)

    Bucerius, Jan [Icahn School of Medicine at Mount Sinai, Translational and Molecular Imaging Institute, One Gustave L. Levy Place, P.O. Box 1234, New York, NY (United States); Mount Sinai School of Medicine, Department of Radiology, New York, NY (United States); Maastricht University Medical Center, Department of Nuclear Medicine, Maastricht (Netherlands); Maastricht University Medical Center, Cardiovascular Research Institute Maastricht (CARIM), Maastricht (Netherlands); University Hospital, RWTH Aachen, Department of Nuclear Medicine, Aachen (Germany); Mani, Venkatesh; Fayad, Zahi A. [Icahn School of Medicine at Mount Sinai, Translational and Molecular Imaging Institute, One Gustave L. Levy Place, P.O. Box 1234, New York, NY (United States); Mount Sinai School of Medicine, Department of Radiology, New York, NY (United States); Mount Sinai School of Medicine, Department of Cardiology, Zena and Michael A. Weiner Cardiovascular Institute and Marie-Josee and Henry R. Kravis Cardiovascular Health Center, New York, NY (United States); Moncrieff, Colin [Icahn School of Medicine at Mount Sinai, Translational and Molecular Imaging Institute, One Gustave L. Levy Place, P.O. Box 1234, New York, NY (United States); Mount Sinai School of Medicine, Department of Radiology, New York, NY (United States); Machac, Josef [Mount Sinai School of Medicine, Division of Nuclear Medicine, Department of Radiology, New York, NY (United States); Fuster, Valentin [Mount Sinai School of Medicine, Department of Cardiology, Zena and Michael A. Weiner Cardiovascular Institute and Marie-Josee and Henry R. Kravis Cardiovascular Health Center, New York, NY (United States); The Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid (Spain); Farkouh, Michael E. [Mount Sinai School of Medicine, Department of Cardiology, Zena and Michael A. Weiner Cardiovascular Institute and Marie-Josee and Henry R. Kravis Cardiovascular Health Center, New York, NY (United States); Mount Sinai School of Medicine, Cardiovascular Imaging Clinical Trials Unit, New York, NY (United States); Tawakol, Ahmed [Massachusetts General Hospital, Harvard University, Cardiac MR PET CT Program, Boston, MA (United States); Rudd, James H.F. [Cambridge University, Division of Cardiovascular Medicine, Cambridge (United Kingdom)

    2014-02-15

    {sup 18}F-FDG PET is increasingly used for imaging of vessel wall inflammation. However, limited data are available on the impact of methodological variables, i.e. prescan fasting glucose, FDG circulation time and injected FDG dose, and of different FDG uptake parameters, in vascular FDG PET imaging. Included in the study were 195 patients who underwent vascular FDG PET/CT of the aorta and the carotids. Arterial standardized uptake values ({sub mean}SUV{sub max}), target-to-background ratios ({sub mean}TBR{sub max}) and FDG blood-pool activity in the superior vena cava (SVC) and the jugular veins (JV) were quantified. Vascular FDG uptake values classified according to the tertiles of prescan fasting glucose levels, the FDG circulation time, and the injected FDG dose were compared using ANOVA. Multivariate regression analyses were performed to identify the potential impact of all variables described on the arterial and blood-pool FDG uptake. Tertile analyses revealed FDG circulation times of about 2.5 h and prescan glucose levels of less than 7.0 mmol/l, showing a favorable relationship between arterial and blood-pool FDG uptake. FDG circulation times showed negative associations with aortic{sub mean}SUV{sub max} values as well as SVC and JV FDG blood-pool activity, but positive correlations with aortic and carotid{sub mean}TBR{sub max} values. Prescan glucose levels were negatively associated with aortic and carotid{sub mean}TBR{sub max} and carotid{sub mean}SUV{sub max} values, but were positively correlated with SVC blood-pool uptake. The injected FDG dose failed to show any significant association with vascular FDG uptake. FDG circulation times and prescan blood glucose levels significantly affect FDG uptake in the aortic and carotid walls and may bias the results of image interpretation in patients undergoing vascular FDG PET/CT. The injected FDG dose was less critical. Therefore, circulation times of about 2.5 h and prescan glucose levels less than 7.0 mmol

  3. Die invloed van herbivorie en vuur op die oorlewing van sekere meerjarige kruide langs die Sabierivier, Kruger Nasionale Park

    Directory of Open Access Journals (Sweden)

    H. Myburgh

    2012-03-01

    Full Text Available Die groot vloede wat in die jaar 2000 in die Kruger Nasionale Park plaasgevind het, het dierivieroewerplantegroei versteur. Dit het die geleentheid gebied om heinings op te rig langsdie Sabierivier om herbivore uit sekere gebiede uit te sluit en sodoende die herstel van die rivieroewerekosisteme te monitor.

  4. Die gebruik van metode in die filosofie, spesiaal in die reformatoriese tra­disie 1

    Directory of Open Access Journals (Sweden)

    N. T. van der Merwe

    1983-03-01

    Full Text Available Die onderw erp van my voordrag, Die gebruik van metode in die fílosofie, verg ’n paar verduidelikende opinerkings vooraf. Ek dink u verm oed alreeds dat hierdie fomulering ’n versuikerde pil is om u in so ’n mate nuuskierig te maak dat una ’n heerlike vrye filosofiese ‘onderonsie’ gedurende die teepouse darem vir ’n tw eede sessie terugkeer. Want is dit nie twee smaaklike heuningdruppels nie: filosofie en sy metode’ en ‘metode in die Reformatoriese filosofiese tradisie'?! Veral as in gedagte gehou word dat in teenstelling met wat ’n mens sou verw ag, daaroor dié onderwerp as sodanig relatief maar heel weinig geskrywe is en word, selfs as die ‘Inleidings in die Metodologie’ daarby gereken word.

  5. Die heelal en sy onstaan (II

    Directory of Open Access Journals (Sweden)

    D. J. Van Rooy

    1952-03-01

    Full Text Available Ons kennis en wetenskap van die hemelliggame word volkome bepaal deur die lig wat ons van hulle ontvang, d.w.s. as ons die feite wat die Bybel daaromtrent meedeel, buite rekening laat.

  6. DIE BETREKKING TUSSEN JESUS EN JOHANNES DIE DOPER Na ...

    African Journals Online (AJOL)

    Test

    Erange/ium des /oAannes, Gött. t lte AufL 1950. 3) Vgl. HEGEStPPUS by Eus. H. E. IV. 22. Dit word tans algemeen aange- neem dat die Mandeërs nie die direkte voortsetting van die Doperdissipels was nie. In 56 n.C. het Paulus hulle nog aangetref te Efese en was hulle skynbaar ook verteenwoordig in Alexandrië.

  7. oor die inhoud en boodskap van die heidelbergse kategismus

    African Journals Online (AJOL)

    gesê word dié artikels handel oor God die Vader “en ons skepping”, oor. God die Seun “en ons verlossing” en oor God die Heilige Gees “en ons heiligmaking”. ...... Catechism, whose single pages cannot be paid for even with tons of gold.' The love for the Catechism will remain as long as there are people who seek their.

  8. Die-stacking architecture

    CERN Document Server

    Xie, Yuan

    2015-01-01

    The emerging three-dimensional (3D) chip architectures, with their intrinsic capability of reducing the wire length, promise attractive solutions to reduce the delay of interconnects in future microprocessors. 3D memory stacking enables much higher memory bandwidth for future chip-multiprocessor design, mitigating the ""memory wall"" problem. In addition, heterogenous integration enabled by 3D technology can also result in innovative designs for future microprocessors. This book first provides a brief introduction to this emerging technology, and then presents a variety of approaches to design

  9. Casting Characteristics of Aluminum Die Casting Alloys

    Energy Technology Data Exchange (ETDEWEB)

    Makhlouf M. Makhlouf; Diran Apelian

    2002-02-05

    The research program investigates the casting characteristics of selected aluminum die casting alloys. Specifically, the alloys' tendencies towards die soldering and sludge formation, and the alloys' fluidity and machinability are evaluated. It was found that: When the Fe and Mn contents of the alloy are low; caution has to be taken against possible die soldering. When the alloy has a high sludge factor, particularly a high level of Fe, measures must be taken to prevent the formation of large hardspots. For this kind of alloy, the Fe content should be kept at its lowest allowable level and the Mn content should be at its highest possible level. If there are problems in die filling, measures other than changing the alloy chemistry need to be considered first. In terms of alloy chemistry, the elements that form high temperature compounds must be kept at their lowest allowable levels. The alloys should not have machining problems when appropriate machining techniques and machining parameters are used.

  10. Wave Forces on Crown Walls

    DEFF Research Database (Denmark)

    Pedersen, Jan; Burcharth, H. F.

    1993-01-01

    This paper presents some of the results from a large parametric laboratory study including more than 200 long-duration model tests. The study addresses both the wave forces imposed on the breakwater crown wall as well as the performance of the structure in reducing the wave overtopping. The testing...... programme includes variations of the sea state parameters and of the geometrical configuration of the breakwater and crown wall. Basic relations between forces/overtopping and the varied parameters are examined and preliminary design guidelines for structures within the tested range of variations...

  11. Die ontwerp van ʼn Afrikaanse taakgebaseerde rekenaaronderrig ...

    African Journals Online (AJOL)

    Kate H

    Beginner Afrikaans Vlak 1 te illustreer. Die navorsing val binne twee breë vakgebiede, waarvan die eerste een die taakgebaseerde benadering tot leer en onderrig is en die tweede een rekenaargesteunde taalonderrig (RGTO). Taakgebaseerde leer en onderrig is ʼn onderrig- benadering waar die fokus van die studente op ...

  12. NORMERING IN DIE AFRIKAANSE RADIO- EN TELEVISIEDIENS ...

    African Journals Online (AJOL)

    Van die jonger Anglisismes kan moontlik met sukses geweer word, byvoorbeeld soveel so dat... (in so 'n mate dat...), die aandele is minder duur (... is goedkoper), die partye ontaoet nekaar halfpad. (... kom mekaar tegemoet), rat race (trapmeul), red tape (rompslomp), die sewentigs (die sewentiger- jare, die jare sewentig), ...

  13. Die Moosgesellschaften des Nationalparks Harz

    OpenAIRE

    Schubert, Rudolf

    2013-01-01

    Die Auswertung der in den Jahren 2002–2007 erarbeiteten Vegetationsaufnahmen im Nationalpark Harz ergab ihre Einordnung in 77 unterschiedliche Moosgesellschaften. 17 Moosgesellschaften gehören zu den bedrohten Lebensgemeinschaften der Länder Niedersachsen und Sachsen-Anhalt, womit die Bedeutung des Nationalparks Harz für die Erhaltung und den Schutz der Moosflora des Harzes deutlich wird. The evaluation of vegetation mapping of moss-communities in the National Park Harz in 2002–2007 result...

  14. Die winder van Afrikaans III.

    Directory of Open Access Journals (Sweden)

    S. du Toit

    1959-03-01

    Full Text Available Dit was ’n gelukkige gedagte om vir hierdie feeste as tema te kies: die wonder van Afrikaans. Inderdaad het daar ’n wonder gebeur — die geboorte van ’n nuwe taal. Maar ’n taal kan nie bestaan sonder dat daar ’n nasie is wat dit praat en skryf nie. Die geboorte van ’.n nuwe nasie is net so ’n wonder.

  15. Die Smart Library UB Hildesheim

    OpenAIRE

    Brahms, Ewald; Schrader, Jarmo

    2015-01-01

    Der Beitrag benennt die aufgrund überholter Gebäudetechnik erforderlichen Modernisierungsmaßnahmen auf der Grundlage netzbasierter Steuerungstechniken, umgesetzt im Rahmen eines Forschungsprojekts und in Zusammenarbeit mit Studierenden der Studiengänge "Umweltsicherung" und "Umweltwissenschaft und Naturschutz" der Universität Hildesheim und zwei mittelständischen Firmen. Ziel ist die Reduzierung des Energieverbrauchs und die Erhöhung der Lern- und Arbeitsqualität durch den Einsatz digit...

  16. Maintaining Low Voiding Solder Die Attach for Power Die While Minimizing Die Tilt

    Energy Technology Data Exchange (ETDEWEB)

    Hamm, Randy; Peterson, Kenneth A.

    2015-10-01

    This paper addresses work to minimize voiding and die tilt in solder attachment of a large power die, measuring 9.0 mm X 6.5 mm X 0.1 mm (0.354” x 0.256” x 0.004”), to a heat spreader. As demands for larger high power die continue, minimizing voiding and die tilt is of interest for improved die functionality, yield, manufacturability, and reliability. High-power die generate considerable heat, which is important to dissipate effectively through control of voiding under high thermal load areas of the die while maintaining a consistent bondline (minimizing die tilt). Voiding was measured using acoustic imaging and die tilt was measured using two different optical measurement systems. 80Au-20Sn solder reflow was achieved using a batch vacuum solder system with optimized fixturing. Minimizing die tilt proved to be the more difficult of the two product requirements to meet. Process development variables included tooling, weight and solder preform thickness.

  17. Osteoporose - die Sicht des Radiologen

    Directory of Open Access Journals (Sweden)

    Grampp S

    1998-01-01

    Full Text Available Die frühe Diagnose der Osteoporose und eine akkurate Beurteilung von Behandlungserfolgen stehen im Mittelpunkt der radiologischen Bemühungen. Die häufigsten angewendeten Methoden, um das periphere Skelett sowie das Achsenskelett zu beurteilen, sind die Zwei-Spektren-Röntgenabsorptiometrie, die quantitative Computertomographie und der quantitative Ultraschall. Generell werden die Meßergebnisse eines Individuums mit einer alters-, geschlechts-, und rassenspezifischen Kontrollgruppe verglichen. In diesem Zusammenhang ist die Bestimmung der Knochenmasse ein Indikator des künftigen Frakturrisikos eines Patienten. Die radiologische Diagnose der Osteoporose kann durch die Bestimmung der Knochenmasse erfolgen, auch wenn keine prävalenten Frakturen vorliegen. Das Frakturrisiko für den Meßwert eines Individuums steigt um etwa das 1,5 bis 2,5-fache für jede Standardabweichung (SD unter der Spitzenknochenmasse der Normbevölkerung (T-score. Die Wahl des Meßortes und der Untersuchungstechnik zur Bestimmung der Knochenmasse oder des Frakturrisikos muß sich nach individuellen Gegebenheiten des Patienten sowie den Stärken und Limitationen der Techniken richten.

  18. Neurokognitiewe integrasie en die leerproses

    Directory of Open Access Journals (Sweden)

    Du Preez, Johan J.

    1991-12-01

    Full Text Available The purpose of this article, "Neuro-cognitive integration and the learning process'; is to find principles and strategies for the development of brain potential and the optimal integration of subject matter. Eight neuro-cognitive systems are identified and their importance to the integration of subject matter is emphasized. These systems are cortical energy, coding, planning and controlling, as well as the verbal sequential, non-verbal holistic, physical-motor, social effective and the subconscious. The relevant principles and strategies can serve as basis for mainstream and special education, guidance as well as psychotherapy. Die doe! met hierdie artikel is om beginsels en strategiee te vind om breinpotensiaal te ontsluit en leerstof optimaal te integreer. Aan die hand van 'n neurokognitiewe model word 'n aantal beginsels en strategiee bespreek en die verband met die leerproses word aangetoon. Agt neurokognitiewe sisteme is gei'dentifiseer en die belangrike rot wat dit speel ten opsigte van die integrasie van leerstof word beklemtoon. Genoemde sisteme sluit die volgende in: kortikale energie, kodering, beplanning en kontrolering, asook die verbaal-sekwensiele, nieverbaal-holistiese, fisiek-motoriese, sosio-affektiewe en die subbewuste. Genoemde beginsels en strategiee kan oak dien as grondslag vir hoofstroomonderwys, spesialiseringsonderwys, voorligting sowel as psigoterapie.

  19. Determination of the metal/die interfacial heat transfer coefficient of high pressure die cast B390 alloy

    Science.gov (United States)

    Cao, Yongyou; Guo, Zhipeng; Xiong, Shoumei

    2012-07-01

    High-pressure die cast B390 alloy was prepared on a 350 ton cold chamber die casting machine. The metal/die interfacial heat transfer coefficient of the alloy was investigated. Considering the filling process, a "finger"-shaped casting was designed for the experiments. This casting consisted of five plates with different thicknesses (0.05 inch or 1.27 mm to 0.25 inch or 6.35 mm) as well as individual ingates and overflows. Experiments under various operation conditions were conducted, and temperatures were measured at various specific locations inside the die. Based on the results, the interfacial heat transfer coefficient and heat flux were determined by solving the inverse heat transfer problem. The influence of the mold-filling sequence, sensor locations, as well as processing parameters including the casting pressure, die temperature, and fast/slow shot speeds on the heat transfer coefficient were discussed.

  20. 1/38 GEBEURLIKHEDE EN DIE BEWYSLAS IN DIE DELIKTUELE ...

    African Journals Online (AJOL)

    tduplessis

    Gebeurlikhede1 in die deliktuele skadevergoedingsreg2 kan omskryf word as onsekere3 omstandighede4 van positiewe of negatiewe aard wat, onafhanklik van die verweerder se optrede5 en indien dit sou realiseer,6 waarskynlik7 'n persoon se gesondheid, inkomste, verdienvermoë, lewenskwaliteit, lewens- verwagting ...

  1. BOEKBESPREKING. Djakarta 1954, 103 blz. Die boeke oor die ...

    African Journals Online (AJOL)

    Test

    hierdie ,,Inleidings”-van-grotereromvang, is dat hulle eintlik monografië oor inleidingsvraagstukke (bv. Uitgangspunt, Grondslae, Gesindheid,. Oordeel, Handeling, Wet van God e.s.m.) gee. Die beginner vind hier weinig oriëntering, omdat 'n sodanige „Inleiding” alreeds 'n aansienlike vordering op die weg van Teologie en ...

  2. Die WAT en etimologie: Word die kringloop voltooi?

    African Journals Online (AJOL)

    Abstract: The WAT and etymology: Will the cycle be completed? Afrikaans historical lexicography is a neglected discipline and to a large extent metalexicographers hold the overall-descriptive Afrikaans dictionary, Die Woordeboek van die Ajri1cJumse Taal, responsible for this state of affairs. The WAT, however, describes ...

  3. Die vlugtige taal van vergeet: Die metafoor by Breyten Breytenbach ...

    African Journals Online (AJOL)

    From his first book of poetry, die ysterkoei moet sweet (“the iron cow must sweat”, 1964), till his most recent one, die windvanger (“the windcatcher”, 2007), metaphor has been a central means towards the creation of meaning for Breytenbach. This article will investigate the use of metaphor particularly in this recent book.

  4. Die indianische Moderne : mit Traditionen die Zukunft gestalten

    OpenAIRE

    Behrend, Olaf; Carstensen, Christian; Kammler, Henry; Schlottner, Michael

    2011-01-01

    Können sich die indianischen Kulturen Nordamerikas im 21. Jahrhundert anders behaupten als nur in der Pflege von Folklore? Wie können Stammesangehörige mit den überlieferten Kenntnissen umgehen und damit ihr Leben in der modernen amerikanischen Gesellschaft gestalten? Wie bestehen Kulturen, die nur knapp der Ausrottung entgangen sind, als Minderheiten im eigenen Land?

  5. die assimilasie van lidmate in die plaaslike geloofsgemeenskap

    African Journals Online (AJOL)

    13 Sep 2010 ... dui dus op 'n verskeidenheid formele en informele prosesse wat mense in staat stel om deel te word van die geloofsgemeenskap (Dudley 1998:114). Wanneer 'n geloofsgemeenskap 'n missionale identiteit ontdek, is groei die uitkoms (Basson 2006:37). Groei kan egter nie doeltreffend plaasvind as daar ...

  6. Numerical optimization of die geometry in open die forging

    DEFF Research Database (Denmark)

    Christiansen, Peter; Hattel, Jesper Henri; Bay, Niels

    2013-01-01

    This paper deals with numerical optimization of open die forging of large metallic ingots made by casting implying risk of defects, e.g. central pores. Different material hardening properties and die geometries are combined in order to investigate, which geometry gives rise to maximum closure...

  7. Demistifikasie van die metafoor “die kerk as bruid”

    African Journals Online (AJOL)

    p1243322

    5 Sep 2007 ... Boston, MA: Beacon. Barth, K 1939-67. Die kirchliche Dogmatik, 4. Zollikon: Evangelicher Verlag. Barth, K 1958. Die kirchliche Dogmatik, 2. Zollikon: Evangelischer Verlag. Batey, R 1961. The church, the bride of Christ. Ann Arbor, MI: University Microfilms. Baumann, G 2003. Love and violence: Marriage as ...

  8. Die rol van moreel in die militêre konflik

    African Journals Online (AJOL)

    Scientia Militaria: South African Journal of Military Studies. Journal Home · ABOUT · Advanced Search · Current Issue · Archives · Journal Home > Vol 13, No 1 (1983) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. Die rol van moreel in die militêre konflik.

  9. Die onderwysmanifes oor waardes en demokrasie in die onderwys ...

    African Journals Online (AJOL)

    Erna Kinsey

    28 Aug 2001 ... In die verband stel John Locke dit dat die mens 'n reg het op lewe, vry- heid, gesondheid, en besittings en dat ander hierdie regte moet respek- teer. As ons aanvaar dat sekere regte met menswees gegee is, dan vloei dit voort dat sodanige regte. • natuurlik is (met menswees gegee) in sover as wat hulle ...

  10. die museum se rolin die aankweek van 'n omgewingsbewustheid

    African Journals Online (AJOL)

    DIE MUSEUM SE ROLIN DIE AANKWEEK VAN 'N. OMGEWINGSBEWUSTHEID. Martie van der Merwe. THE ROLE OF MUSEUMS IN THE DEVELOPMENT OF ENVIRONMENTAL AWARENESS. The aim of this paper is to stress the importance and urgency of educating about the environment in the South African context.

  11. N HERSIENING VAN DIE AFRIKAANSE VERTALING VAN DIE ...

    African Journals Online (AJOL)

    Test

    , „Want Herodes vreesde Johannes' . Die griekse woord wat hier vertaal word as „bang wees", beteken ook iets anders, ^melik ,,om ontsag te hê" soos byvoorbeeld in Ef. 5 :33 en Lev. 19:3 (Septuaginta) Die sinsverband vra in hierdie teks ook.

  12. Die totstandkoming en bedrywighede van die ASAF-koor in ...

    African Journals Online (AJOL)

    Komposisies soos Elia van Mendelssohn, die Requiems van Mozart en Verdi, Beethoven se Negende Simfonie, Bach se Mattheuspassie en Händel se Messias was deel van hulle repertorium. Koorsang is ook deur Keet in ander sentrums aan die Witwatersrand aangemoedig. Danie van den Heever het Keet in 1963 as ...

  13. Die teologiese eie-aardigheid van die Nederduitsch Hervormde Kerk

    African Journals Online (AJOL)

    Christus leeft in mij, en daartoe prediken wij de heden ten dage levende persoonlijkheid van Christus, niet alleen den historischen. Christus, die 1900 jaar geleden op aarde gewandeld heeft, maar Jezus. Christus, die nu nog elken dag naast ons staat.... Deze persoonlijke verhouding tot omgang met Jezus Christus komt tot ...

  14. Verkondig Christus totdat hy kom! Die huidige denke binne die ...

    African Journals Online (AJOL)

    Verkondig Christus totdat hy kom! Die huidige denke binne die Evangeliese Beweging. J J Kritzinger. Universiteit van Pretoria. Abstract. World evangelisation within the Lausanne movement. This article considers a number of key themes regarding world evangelisation. The point of departure is the second general ...

  15. die suid-afrikaanse blanke jeug in die tweede vryheidsoorlog

    African Journals Online (AJOL)

    blik gekondenseerde melk. "Undesirables" (B-skaal per dag). ~ Ib vars vleis. ~ Ib meel, rys of gestampte mielies. ~ ons koffie. 1 ons suiker. 1 ons sout. ,Je blik gekondenseerde melk19. Uit die bogenoemde rantsoenskale is dit duide- lik dat daar nie noodsaaklike voedsels soos groente, vrugte of vars melk verskaf is nie. Die.

  16. 'n Algoritme vir die minimum van die konkawe knapsakprobleem

    African Journals Online (AJOL)

    'n Algoritme vir die minimum van die konkawe knapsakprobleem. G Venter∗. JS Wolvaardt†. Ontvang: 15 Januarie 1999; Hersien: 3 Desember 2004; Aanvaar: 27 Maart 2005. Abstract. This paper addresses the problem of resource allocation among activities where the cost of each is described by a concave function.

  17. Bullinger en die verbond na aanleiding van die Tweede Switserse ...

    African Journals Online (AJOL)

    novum testamentum zusammengefast und durch seinen Tod vol- lendet oder ratifiziert hat ... Die botschaft der Evangelien ist es gerade, Christum leseum aliud nihil esse quam aetemi foederis aeternum obsidem atque misericordiae et veritatis Dei testem'. (Koch 1968: 399). Hiermee het duidelik geword dat Bullinger die ...

  18. Wie is die sondaar? Die beskouing van Karl Barth

    African Journals Online (AJOL)

    voudige daad, woord of gedagte nie, maar beskuldig ons dat ons ons hele lewe op die basis van hoogmoed voer en ons van begin tot end uit hierdie bodem voed. Die Woord beskuldig ons dat ons oral en altyd daaraan skuldig is, dat ons op God se genade nie met ooreenstemmende dankbaarheid nie, maar in een of.

  19. Die wortels en kenmerke van die tradisionele Afrikaanse lewenstyl

    Directory of Open Access Journals (Sweden)

    A. Coetzee

    1970-03-01

    Full Text Available In ons tydsgewrig kan dit moontlik vreemd opklink om by 'n akademiese fees te begin met ’n verwysing na ’n Bybelwoord, maar hier, vandág, waar ons die honderdste bestaansja a r feestelik gedenk van 'n hoëronderwysinrigting wat onbevange in sy naamvaandel die stempel „Christelik” dra, sal dit niemand verbaas as ek my reiaas vanmore plaas onder ’n Bybelteks nie: Matt. 7:16 — ... ’n Mens pluk tog nie druiwe van dorings of vye van distels nie? Matt. 12:33 — Julie moet of die boom goed maak en sy vrugte goed, of julle moet die boom sleg maak en sy vrugte sleg; want aan sy vrugte word die boom geken.

  20. SUSCEPTOBILITY TO THERMAL FATIGUE OF CLOSED DIE HOT FORGING DIES

    Directory of Open Access Journals (Sweden)

    Frederico de Castro Magalhães

    2014-06-01

    Full Text Available Hot forging dies providing high productive performance reduce production costs. The lifetime of the dies is expressed by the number of forgings (production cycle produced before being rejected by the presence of a failure mechanism, associated with unacceptable dimensions and or geometry of the end product or even breakage of the dies. One of the failure mechanisms of hot forging dies is thermal fatigue, caused by cyclic heating and cooling. A subroutine, based on the work of Maim and Norstrom [1], was developed for the DEFORM 2D numerical software, using the finite element method, in order to predict die regions susceptible to thermal fatigue. The use of adequate coefficients for the description of the heat transfer phenomena allowed the validation of the proposed subroutine.

  1. Pylstertmotte (Lepidoptera: Sphingidae van die Nasionale Krugerwildtuin

    Directory of Open Access Journals (Sweden)

    M. A. van den Berg

    1975-07-01

    Full Text Available 'n Totaal van 42 spesies van pylstertmotte is in die Nasionale Krugerwildtuin versamel. Die bekendste hiervan is die patatrusper (Herse convolvuli (L en die dood-skedelmot (Acherontia atropos (L. Die volgende spesies wat versamel is, se voorkoms is nog nie voorheen vir die Republiek van Suid-Afrika aangemeld nie nl. Pemba flavillacea (Walk., Praedora plagiata (R. &J., Leptoclanis basalis (Walk., Polyptychus calcareus (R. &J., Polyptychus compar (R. &J., Nephele aequivalens (Walk., Nephele peneus (Cram., Hippotion roseipennis (Butler en Xenosphingia jansei (Jord.. Die verspreiding van Oligographa juniperi (Bsd. wat langs die kusgebiede van Natal en die Oos-Kaap aangetrefword, is op verskeie plekke in die Krugerwildtuin versamel.

  2. Die Presbiter by Lukas en Paulus

    Directory of Open Access Journals (Sweden)

    L. Floor

    1976-06-01

    Full Text Available In die jongste navorsing oor Lukas word die skrywer van die derde evangelieverhaal en die Handelinge van die Apostels aan ons bekend gestel as ’n teoloog wat uit die ‘Sitz im Leben’ (uit die situasie van sy eie tyd die boodskap aangaande Christus interpreteer . Lukas sou hom by sy interpretasie van die Christusboodskap laat lei het deur ’n bepaalde dogmatiese ‘Verstandnis’ waardeur hy homself verraai as ’n teoloog van die na-apostoliese tyd.

  3. Falling walls

    CERN Multimedia

    It was 20 years ago this week that the Berlin wall was opened for the first time since its construction began in 1961. Although the signs of a thaw had been in the air for some time, few predicted the speed of the change that would ensue. As members of the scientific community, we can take a moment to reflect on the role our field played in bringing East and West together. CERN’s collaboration with the East, primarily through links with the Joint Institute for Nuclear Research, JINR, in Dubna, Russia, is well documented. Less well known, however, is the role CERN played in bringing the scientists of East and West Germany together. As the Iron curtain was going up, particle physicists on both sides were already creating the conditions that would allow it to be torn down. Cold war historian Thomas Stange tells the story in his 2002 CERN Courier article. It was my privilege to be in Berlin on Monday, the anniversary of the wall’s opening, to take part in a conference entitled &lsquo...

  4. Mechanical Properties of Aluminum Die-casting Alloys

    Directory of Open Access Journals (Sweden)

    Sun Xiaodong

    2016-01-01

    Full Text Available The effects of strontium addition on the microstructure and mechanical properties of aluminum alloys 380 and 413 are researched. All samples are prepared through high pressure die-casting, and the effect of the sample’s thickness is also compared. The results indicate that the Sr addition can refine the metallographic microstructure of two alloys in different degrees, mainly to eutectic Si phase. The mechanical properties of the two alloys are improved slightly through Sr modification to the thin wall castings. The enhancement of mechanical properties is evident to the thick wall castings.

  5. Statues Also Die

    Directory of Open Access Journals (Sweden)

    Pierre-Philippe Fraiture

    2016-10-01

    Full Text Available “African thinking,” “African thought,” and “African philosophy.” These phrases are often used indiscriminately to refer to intellectual activities in and/or about Africa. This large field, which sits at the crossroads between analytic philosophy, continental thought, political philosophy and even linguistics is apparently limitless in its ability to submit the object “Africa” to a multiplicity of disciplinary approaches. This absence of limits has far-reaching historical origins. Indeed it needs to be understood as a legacy of the period leading to African independence and to the context in which African philosophy emerged not so much as a discipline as a point of departure to think colonial strictures and the constraints of colonial modes of thinking. That the first (self-appointed exponents of African philosophy were Westerners speaks volumes. Placide Tempels but also some of his predecessors such as Paul Radin (Primitive Man as Philosopher, 1927 and Vernon Brelsford (Primitive Philosophy, 1935 were the first scholars to envisage this extension of philosophy into the realm of the African “primitive.” The material explored in this article – Statues Also Die (Marker, Resnais, and Cloquet, Bantu Philosophy (Tempels, The Cultural Unity of Negro Africa (Cheikh Anta Diop, and It For Others (Duncan Campbell - resonates with this initial gesture but also with the ambition on part of African philosophers such as VY Mudimbe to challenge the limits of a discipline shaped by late colonialism and then subsequently recaptured by ethnophilosophers. Statues Also Die is thus used here as a text to appraise the limitations of African philosophy at an early stage.  The term “stage,” however, is purely arbitrary and the work of African philosophers has since the 1950s often been absorbed by an effort to retrieve African philosophizing practices before, or away from, the colonial matrix. This activity has gained momentum and has been

  6. Friction Stir Welding of Magnesium Die Castings

    Science.gov (United States)

    Skar, Jan Ivar; Gjestland, Haavard; Oosterkamp, Ljiljana Djapic; Albright, Darryl L.

    Friction stir welding (FSW), being a solid-state process, is an attractive method for joining magnesium die castings. In this study, FSW of AZ91D and AM50A plates was performed both on the individual alloys and to join them together. The welds were sound and free from defects, except for small surface cracks in AM50A; a fine microstructure characterized the weld zones. The tensile properties of specimens transverse to the weld zone were measured, as were the corrosion properties. The tensile properties were somewhat lower than the base metal, with the largest percentage decrease found in the elongation of AM50A, perhaps due to the surface cracking. The corrosion resistance of the weld zone was relatively poor, most likely due to iron contamination from wearing of the tool. Further optimization of the FSW tool design and process parameters must take place to improve the reliability of FSW for magnesium die castings.

  7. D r. E. S. M ulder, Die Teologie van die Jesaja-apokalipse (Jes.

    African Journals Online (AJOL)

    Test

    In 26:15 is dit nogal gewaag om die vier perfecta met vier futurums weer te gee; as mens met die Afrikaanse vertaling die perfecta wil behou nie, sou 'n praesens- vertaling die regte wees. Of 26:20 die weergawe „vervloeking” beter is as die gebruiklike „toorn” lyk my baie twyfelagtig, vgl. die aan gehaalde parallelle op bl.

  8. Die Fakulteit Teologie (Afd A) aan die Universiteit van Pretoria; Vrae ...

    African Journals Online (AJOL)

    dié opsig het die vestiging en onderhoud van die Fakulteit ryke vrugte afgewerp. Oor die 75 jaar is meer as 500 predikante aan die kerk gelewer en het 56 die dokto- rale studie voltooi. Onder die genoemde 12 predikante van 1917 was daar twee wat die doktorale eksamen afgelê het (Van Belkum en Fourie) maar geen ...

  9. Dying and 'euthanasia'.

    Science.gov (United States)

    Benatar, S R

    1992-07-01

    Medical progress, secularisation of life, growing acceptance of individual human rights (including the right to refuse medical treatment) and of shared decision-making in medicine have focused public attention on the ways in which life may, and perhaps even ought to, be allowed to end in our complex modern era. Intense and thoughtful bio-ethical debate over many years has 'unpacked' the many different understandings and interpretations of the word euthanasia. The consequent conceptual clarification together with recognition and acknowledgement of psychological implications has facilitated a growing rational consensus on openly accepting the withholding and withdrawing of treatment (under defined conditions) within the realm of sound medical practice. This is clearly distinct from assisted suicide and active euthanasia which are generally considered unacceptable perversions of medical practice. Given the ability to sustain life for prolonged periods, often in a permanent state of unconsciousness, the unrealistic expectations of some medical personnel and the lay public, the severe constraints on health care facilities in South Africa and the totally inadequate allocation of resources for highly effective medical treatments, it is appropriate to re-open public debate on the limits of 'striving officiously to keep alive' and on the distinction between 'allowing to die' and 'killing'. Concern that 'rational' arguments reflect moral decay rather than moral progress keeps the debate open and focuses attention on some 'slippery slope' consequences.

  10. Die Parlamentswahlen 2008 in Malaysia

    DEFF Research Database (Denmark)

    Reher, Stefanie; Knirsch, Thomas

    2008-01-01

    Nach den Parlamentswahlen vom März 2008 in Malaysia deutet manches auf einen politischen Umbruch hin: Die regierende Barisan Nasional (BN), die sich bislang einer komfortablen Zweidrittelmehrheit von 91,4 Prozent der Sitze im Parlament des Landes erfreut hatte, rutschte auf 63,1 Prozent ab und das...

  11. Electric steering; Die elektrische Lenkung

    Energy Technology Data Exchange (ETDEWEB)

    Trost, J. [DaimlerChrysler AG (Germany)

    2001-07-01

    Modern industrial trucks already have a large number of electronic systems. With electric steering systems, all steering systems have electronic interfaces, which will influence the safety, functionality and cost of a vehicle. Optimization of the driver workplace, the installation of active safety systems, and the optimization of the failure characteristics can improve passive and active safety. With electronic interfaces to all vehicle control system, the truck can be integrated easily in automatic transport processes. Finally, the simplified interfaces in the vehicle will reduce the overall cost. Failure management is an indispensable precondition for the introduction of electric steering systems, as are correct specifications. A status report is presented. [German] Eine Vielzahl von Systemen sind im modernen schweren Nutzfahrzeug bereits elektronisch (by Wire) realisiert. Mit der elektrischen Lenkung sind saemtliche Systeme zur Laengs- und Querregelung des Fahrzeuges mit elektronischen Schnittstellen versehen. Dies hat Auswirkungen auf die Sicherheit, die Funktionalitaet und die Kosten des Gesamtfahrzeuges. Durch Optimierung des Fahrerarbeitsplatzes, Einfuehrung aktiver Sicherheitssysteme und Optimierung des Ausfallverhaltens koennen die passive wie aktive Sicherheit des Fahrzeuges verbessert werden. Mit den elektronischen Schnittstellen zu allen Fahrzeugfuehrungssystemen kann das Nutzfahrzeug in hervorragender Weise in automatisierte Transportaufgaben integriert werden. Schliesslich lassen sich durch die vereinfachten Schnittstellen im Fahrzeug Kosten im Gesamtfahrzeug reduzieren. Die Beherrschung des Ausfallverhaltens ist aber ebenso wie eine angepasste Vorschriftenlage Voraussetzung fuer die Einfuehrung der elektrischen Lenkung. Ueber den Stand der Entwicklung wird berichtet. (orig.)

  12. Noodgevalle ID die Mediese Praktyk*

    African Journals Online (AJOL)

    20 Jan 1973 ... pasient-geneesheer kontak, om deur soortgelyke hipo- tetiese drilprosedures te gaan? Om jouself moontlikc praktiese situasies voor te skilder, foute en tekortkoming~ in jou kennis op te spoor, en die leemtes aan te vul? 'n Paar willekeurige voorbeelde kan genoem word: I. 'n long man le in die straat met 'n ...

  13. DIE KERKLIKE STIMULASIE VAN EIETYDSE ...

    African Journals Online (AJOL)

    22 Nov 2010 ... and far-reaching possibilities within the industrial environment. INLEIDING. In die eerste artikel is as medewerker .... 1969, 1975) inspireer die Pan African Christian Leadership. Assembly (PACLA) in Nairobi (tydens 1976), ..... 1983, 'The process of contextualization and its limits', Verbum SVD 24, 163–171.

  14. Die etiek van Karl Barth

    Directory of Open Access Journals (Sweden)

    J. H. van Wyk

    1986-06-01

    Full Text Available Die etiek van Barth kan nie reg verstaan word sonder begrip van sy ganse teologiese agtergrond en opset, en ek wil byvoeg: sonder die besondere tydsomstandighede (oorlog! waarin hy geleef en gewerk het nie. Dit is verder bekend dat in sy teologiese ontwikkeling verskillende figure groot invloed op hom uitgeoefen het.

  15. Montessori-skole: die ander kant

    Directory of Open Access Journals (Sweden)

    Monica Viljoen

    1995-03-01

    Full Text Available Na aanleiding van die artikel “Die invloed van die New Age-beweging op die onderwysagenda van die toekoms” deur Lien van Niekerk en Corinne Meier van die Departement Historiese Opvoedkunde van Unisa (vgl. Koers, 59 (1 1994:69-84 wil ek graag ’n ander sy van Montessori-skole onder die aandag van Koers lesers bring.

  16. OPMERKINGS OOR DIE MOONTLIKE HERSIENING VAN ONS ...

    African Journals Online (AJOL)

    Test

    niks in hulle liturgie opneem wat nie vervat is in die geloofsbelydenis en wat nie bekend is uit die Kategismus nie. In hierdie sin is die reforma- toriese Kerk gekant teen „nuwighede” , d.w.s. teen die invoering van dinge wat nie bekend is uit die Kategismus van die Kerk nie. Daarom is die drie groot vaste liturgiese stukke van ...

  17. Leierskapstyl en die lerende organisasie

    Directory of Open Access Journals (Sweden)

    W. G. Victor

    2002-09-01

    Full Text Available Leadership style and the learning organisation. In the present highly competitive environment, it has become increasingly important for organisational leaders to establish a learning organisation. In this study the focus was on the extent of influence that the evolution of organisations, as determined by their relative level of leadership practises (leadership style, has on the establishment of a learning organisation. Opsomming Die daarstel van ’n lerende organisasie deur bedryfsleiers word toenemend belangrik in die hedendaagse hoogskompeterende omgewing. In hierdie studie is gefokus op die mate van beinvloeding wat die evolusie van organisasies, soos deur hul relatiewe vlak van demokratiese leierskapspraktyke (leierskapstyl bepaal, op die daarstelling van’n lerende organisasie het.

  18. Die betekenis wat kommunikasiekunde vir die prediking kan hê

    Directory of Open Access Journals (Sweden)

    H. P. Fourie

    1978-06-01

    Full Text Available Kommunikasiekunde is een van die jongste wetenskappe wat in die area van geesteswetenskappe ontstaan het. Dit is ’n vak wat eintlik ontstaan het uit die samevoeging van verskeie vertakkings wat vandag almal as onderafdelings van die Kommunikasiekunde beskou word. Die heel oudste hiervan is die retoriek soos dit al van voor Christus af deur die Grieke geleer is. In die meer resente verlede was Joernalistiek meer as dikwels die voorloper van huidige kommunikasiekunde-departement gewees.

  19. Influence of bondcoat composition and manufacturing parameters on the lifetime of thermal barrier coatings under cyclic temperature loading; Einfluss der Bondcoatzusammensetzung und Herstellungsparameter auf die Lebensdauer von Waermedaemmschichten bei zyklischer Temperaturbelastung

    Energy Technology Data Exchange (ETDEWEB)

    Subanovic, Marko

    2008-08-21

    In the present study the influence of the bond coat composition on the lifetime of thermal barrier coatings during thermal cycling was investigated. The knowledge, that the reactive elements (RE), which are essential for the improvement of the oxide scale adhesion, are ''lost'', during the bond coat processing, made it necessary to investigate systematically the influence of the different manufacturing stages on the RE distribution. After VPS (vacuum plasma spraying) with a high oxygen partial pressure in the spraying chamber, the reactive elements in the NiCoCrAl-coating were tied up in oxide precipitates, and thus their beneficial effect on the scale adhesion was inhibited. Another important observation is that the RE's are depleted during the bondcoat vacuum heat-treatment. The degree of Y-depletion depends not only on the Y-reservoir in the coating (Y-content and thickness) but also on the heat-treatment parameters, such as vacuum quality and temperature. A thin, dense alumina oxide scale with a smooth interface between bond coat and TGO doesn't necessary lead to a lifetime extension of the EB-PVD TBC's. TBC's with such oxide morphology typically failed due to crack formation and propagation along the interface between the TGO and the bondcoat. By addition of zirconium it was possible to shift the failure initiation from the interface TGO/bondcoat to the interface TBC/TGO, which can apparently accommodate more thermal strain energy before failure. The shift of the failure location was achieved by a change of the oxide morphology, which mainly relies on adjusting a non-even wavy interface between the TGO and the bond coat and formation of defected oxide layers. In contrast, a defected oxide scale with a high growth rate shortened the life time of APSTBC's. Porosity and spinel formation weakened the mechanical integrity of the oxide scale, and facilitated the crack formation and propagation of the already existing

  20. die impak van metodologie op die verstaan van die nuwe testament ...

    African Journals Online (AJOL)

    na die Evangelies gekyk het, dink jy vir altyd anders oor hulle tot- standkoming. Inderdaad, nuwe metodes ... het nie hierdie twee benaderings gekies omdat ek dink dat dit die beste beskikbare leesstrategieë is ...... Family of the King: dynamics of metaphor in the Gospel according to John. Leiden/. Boston: Brill. VAN ZYL H C.

  1. Die toepassing van die Q-metode van die NIPN vir poswaardering by kooperasies

    Directory of Open Access Journals (Sweden)

    A. L. Barnard

    1978-11-01

    Full Text Available The application of the Q-method of job evaluation in 13 small, medium and big co-operatives, is discussed. Specific attention is given to the purpose and method of investigation; the findings and recommendations made to the various boards of directors as well as the specific problems encountered in the application of the Q-method and the establishment of an integrated salary structure. Differences between the three categories of cooperatives regarding pay curves, the under or over payment of comparable job grades etc., are discussed.OpsommingDie toepassing van die Q-metode van poswaardering by 13 koöperasies, bestaande uit klein, middelslag en groot koöperasies, word bespreek. Aandag word veral aan die doel en metode van ondersoek gewy. Verder word bevindinge en aanbevelings aan die verskillende direksies bespreek rakende spesifieke probleme wat ervaar is met betrekking tot die toepassing van die Q-metode en die koppeling van posgrade met salarisskale. Verskille tussen die drie kategorieë koöperasies ten opsigte van salariskurwes, oor- of onderbetaling van vergelykbare posgrade, ens. word aangedui.

  2. Reformasie: John Knox, Die Skotse Calvinis*

    Directory of Open Access Journals (Sweden)

    V. E. d'Assonville

    1958-03-01

    Full Text Available As ons aan John Knox, die Skotse Hervormer, dink, dan sien ons voor ons oprys die beeld van die Ou-Testamentiese profeet wat sy stem in die woestyn verhef en gekleed gaan met ’n harige mantel en ’n leergord om sy heupe. John Knox het die byl aan die wortel van elke afgodsboom gelê. Soos ’n Luther het hy in die taal van die volk gespreek en daar was by hom geen vrees om selfs in paleise die oordeel van God oor konings aan te kondig nie.

  3. A. VAN SELMS. LUKAS SE SEGSMAN VIR DIE GESKIEDENIS VAN ...

    African Journals Online (AJOL)

    Test

    wek dit die gewaarwording by die leser dat een van die Emmaüsgangers. -self hierdie geskiedenis aan die skrywer van die derde Evangelie vertel het. Hierdie gewaarwording van die onmiddellikheid van die oorlewe- ring berus op verskillende gronde. Die eerste is die merkwaardige palestynse kleur van die geskiedenis ...

  4. ORIGINAL ARTICLE Sonographic gallbladder wall thickness in ...

    African Journals Online (AJOL)

    The study population's age ranged from 16 - 78 years, with a mean age and SD of 32±13.2 years. The age parameter was unevenly distributed. →. →. Fig. 1. Longitudinal US image showing site of measurement of gallbladder wall thickness (arrows). Table I. Age distribution of mean gallbladder wall thickness in the study ...

  5. KAAPSE PREDIKANTE VAN DIE SEWENTIENDE EN AGTIENDE ...

    African Journals Online (AJOL)

    Test

    'n vark en 'n buffel geslag is/). Later het dit egter beter geword, veral nadat die Klassis Amster dam in Maart 1621 'n liggaam in die lewe geroep het wat bekend gestaan het onder die naam van Depufai: ad. /nJ:*cas wat onder toesig van die Klassis die Indiese kerksake moes behartig. Hierdie ou sieketroosters het, wat ook ...

  6. pastorale begeleiding aan die persoon met dissosiatiewe ...

    African Journals Online (AJOL)

    Although dissociative identity disorder is described as a mental disorder in the DSM-IV, there are still unresolved issues regarding the .... dat dit die sensasie van die media aangryp;. • dat dit 'n gewilde onderwerp van bespreking op die ..... misleiding van die slang (Satan). Die mens was aan God ongehoorsaam en het sy ...

  7. Die ontwikkeling van 'n groeiende bevrydingsbediening: 'n ...

    African Journals Online (AJOL)

    Die gegewens dui daarop dat hierdie bediening in die meeste kerklike denominasies sowel as deur sommige medici en ander professionele verwante gesondheidsvakkundiges beoefen word. Die noodsaaklikheid daarvan om die resultaat van die ondersoek in teorievorming te benut, word aangedui. (Acta Theologica, 21 ...

  8. Die Klein Begin 1916−1933

    Directory of Open Access Journals (Sweden)

    J.P. Oberholzer

    2010-09-01

    Full Text Available Die opleiding neem ‘n aanvang met een kerklike dosent, J.H.J.A. Greyventein, en ‘n aantal universiteitsdosente. Die studentetal groei stadig. Die vertrek van professor Paterson en die koms van S.P. Engelbrecht in 1921 bring ‘n belangrike wending. Wanneer B. Gemser in 1926 toetree, is daar drie dosente wat tegelyk ampsdraers van die Nederduitsch Hervormde Kerk is. Gemser is dosent in Teologie sowel as in Lettere en Wysbegeerte waar hy begin met die vestiging van ‘n sterk departement Semitiese Tale. Engelbrecht se kundigheid omvat Kerkgeskiedenis sowel as ‘n unieke kennis van die Voortrekker- en ou Tansvaalse geskiedenis en dit kom die Departement Geskiedenis ten goede. Die akademiese gehalte van die opleiding neem toe, en so ook die studentetal. ‘n Bedreiging vir die voortbestaan van die Fakulteit teologie is afgeweer deur die tydige optrede van S.P. Engelbrecht en die tussenkoms van die Eerste Minister. Die selfstandigwording van die Universiteit van Pretoria en die Afrikaanswording van die Universiteit bring ‘n veranderde konteks.

  9. Die kliniese kindersielkundige as diagnostikus1

    Directory of Open Access Journals (Sweden)

    D. J. W. Strümpfer

    1961-03-01

    Full Text Available Die benaming „Kliniese Kindersielkunde” is nog onbekend en gevolglik betreklik onbemind. Dit is in 1951 die eerste keer gebruik. Die werk van die Kliniese Kindersielkunde is egter so oud as die werk van die algemene Kliniese Sielkunde, waarvan die geskiedenis gewoonlik teruggevoer word tot die begin van sielkundige toetsing vroeg in die tagtigerjare. Tot ’n aansienlike mate is hierdie vroeë werk op kinders uitgevoer, bv. dié van Galton en later die van Binet en Simon. Witmer het in 1896 die eerste sielkundige kliniek geopen en het ook die term „Kliniese Sielkunde” ingevoer; die meerderheid van sy pasiënte was egter ook kinders. Tot voor die Tweede Wêreldoorlog was klinies-sielkundige werk hoofsaaklik op kinders toegespits. Sedertdien het die kliniese sielkundige tot ’n belangrike mate toegetree tot die gebied van die diagnose en terapie van psigiese afwykings by volwassenes, tot so ’n mate dat in die gedagtes en geskrifte van baie werkers die terrein van die Kliniese Sielkunde byna tot werk met volwassenes beperk word.

  10. Die wêreld en ons

    Directory of Open Access Journals (Sweden)

    D. W. Kruger

    1950-03-01

    Full Text Available Gedurende die jaar 1949 het Sowjet-Rusland twee groot suksesse behaal, n.l. die oorwinning van die Komniunisnie in China en die vervaardiging van die atoombom, albei gebeurtenisse wat vir sy westerse teenstanders ’n groot ontngtering was.

  11. Study on interfacial heat transfer coefficient at metal/die interface during high pressure die casting process of AZ91D alloy

    Directory of Open Access Journals (Sweden)

    GUO Zhi-peng

    2007-02-01

    Full Text Available The high pressure die casting (HPDC process is one of the fastest growing and most efficient methods for the production of complex shape castings of magnesium and aluminum alloys in today’s manufacturing industry.In this study, a high pressure die casting experiment using AZ91D magnesium alloy was conducted, and the temperature profiles inside the die were Measured. By using a computer program based on solving the inverse heat problem, the metal/die interfacial heat transfer coefficient (IHTC was calculated and studied. The results show that the IHTC between the metal and die increases right after the liquid metal is brought into the cavity by the plunger,and decreases as the solidification process of the liquid metal proceeds until the liquid metal is completely solidified,when the IHTC tends to be stable. The interfacial heat transfer coefficient shows different characteristics under different casting wall thicknesses and varies with the change of solidification behavior.

  12. 'n Akoestiese ontleding van die glottale puls van sekere stempatologiese verskynsels

    Directory of Open Access Journals (Sweden)

    Emily Groenewald

    1977-07-01

    Full Text Available 'n Uitgebreide akoestiese analise van die glottale golf-vorm  van normale en patologiese stemme deur middel van 'n unieke opnametegniek en analiseproses is gedoen met die oog op 'n kritiese evaluering van die toepassingsmoontlikhede van die metode en inligting wat verkry kan word. By die ondersoek is 15 normale en 17 abnormale stemme betrek. Die abnormale groep sluit in toestande soos karsinoma, nodules, poliepe, papiloma, ventrikulere fonasie  en stemlipverlammings. 'n Fluktuasiefaktor  of  afwykingsfaktor vir elke parameter in 5 fonasiewyses  van elke afwykende  stem is bepaal. Elke abnormale stem is individueel met die normale groep vergelyk en dit blyk dat die afwykingsfaktore  verband hou met die graad en omvang van die patologie. Aanduidings bestaan dat daar tipiese resultate vii spesifieke  patologiese toestande mag wees en dit blyk dat die metode beslis potensiele waarde inhou vir die objektiewe evaluering en beskrywing van die stem, sowel as hulpmiddel in stemterapie.

  13. DIE EINDE VAN SENDING Fases in die Sendingbedryf

    African Journals Online (AJOL)

    questions are focused on the situation in the mission work of the Dutch ..... opmerkings gemaak wat relevant is vir ons argument. ... onafhanklik sou funksioneer (“self support”), en self met die verdere sending ... (“the euthanasia of mission”).

  14. Die Dankesrede bei der Preisverleihung

    Directory of Open Access Journals (Sweden)

    Elenmari Pletikos Olof

    2012-12-01

    Full Text Available Festliche Preisverleihungen sind Gelegenheiten, bei denen von den Preisträgerneine kurze Rede erwartet wird. Obwohl die Dankesrede eine kleinere Randgattung innerhalb des epideiktischen Genres ist, steht sie im Mittelpunkt des Ereignisses. Rhetorikhandbücher geben zahlreiche Ratschläge, wie eine gute Festrede vorbereitet werden soll, um zu unterhalten, zu bewegen und zu belehren. Ziel dieser Untersuchung ist es festzustellen, welche Eigenschaften der Dankesrede die Zuhörer als erwünscht oder unerwünscht wahrnehmen und welche Charakteristika am meisten zur Qualität festlicher Dankesreden beitragen. Das Korpus der gesprochenen Texte bilden 30 Dankesreden anlässlich kroatischer Preisverleihungen in den Bereichen Schauspiel, Sport, Musik, Fernsehen, Literatur und Wirtschaft. Die Audio-Aufnahmen der Dankesreden wurden einer Gruppe von Hörern zur Bewertung in folgenden Kategorien vorgelegt: interessant, geistreich, hoher Sprachstil, feierlich, emotiv, persönlich, originell, bescheiden, vorbereitet und spontan. Zusätzlich wurde zu jeder Rede die offene Frage gestellt, was dem Zuhörer an der Rede gefallen oder nicht gefallen habe. Die Resultate der Perzeptionsanalye lassen erkennen, dass die Interessantheit einer Rede mit der Eigenschaft des Geistreichen, des Originellen, des Emotionalen und des Persönlichen in Verbindung gebracht wird und die Eigenschaft des Festlichen im Wesentlichen nur mit dem hohen Sprachstil und der Vorbereitetheit des Textes korreliert. Einige Eigenschaften können sowohl erwünscht als auch unerwünscht sein, z. B. Dialekt, Persönliches und Kürze. Die besten Dankesreden haben Eigenschaften, die im Grunde schwer miteinander zu verbinden sind: Einerseits soll der Text vorbereitet sein (hoher Stil, Wortwahl, Figuren, Originalität der Geschichte, Humor, andererseits wird bei der Ausführung Spontaneität (Aufrichtigkeit, Emotionalität, Persönlichkeit erwartet.

  15. GUEST LECTURES Die Koue Oorlog: Die Wereid se Langste ...

    African Journals Online (AJOL)

    were able to bring about, kept the world on the brink of war, a nuclear war that was gener- ally believed would be the ... nuclear physicist Bernard Baruch when he referred to the fact that we are in the midst of a cold war.2. In that same .... "its fusion of imperialist motive and anti-communist ideology"9. Die Nuwe Realisme: die ...

  16. Simulation des Einflusses von Bewölkung auf die UV-Strahlung mittels Neuronaler Netze

    OpenAIRE

    Schwander, Harald

    1999-01-01

    Erklärtes Ziel der Modellierung der UV-Strahlung ist die Bereitstellung von Werten für Zeiten und Orte, an denen nicht gemessen werden kann, sowie zur Prognose. Im wolkenfreien Fall lassen sich die UV-Strahlungsgrößen hinreichend genau modellieren. Die Fehler resultieren im Wesentlichen aus der unpräzisen Kenntnis der relevanten atmosphärischen Parameter. Demgegenüber ist die Modellierung der UV-Strahlung bei Bewölkung bisher nur unzureichend gelöst. Die diesbezüglichen Problematiken sind vie...

  17. Sintaksis in Duits-onderrig: die plasing van die onderwerp

    Directory of Open Access Journals (Sweden)

    Steyn, E.C.

    1991-12-01

    Full Text Available In spite of strong similarities between German and Afrikaans syntax, there are also considerable differences, such as the positioning of the subject, which frequently appears much later in German sentences than in Afrikaans. This is evident, for example, in the comparison of a few parallel texts. An empirical investigation showed that the defennent of the subject undeniably creates problems for Afrikaans speaking students learning German. They find sentences with a deferred subject difficult to understand and find it even more difficult to construct their own sentences in this way. A few practical suggestions for teaching methods aimed at resolving these difficulties are presented here. Ten spyte van sterk ooreenkomste tussen die Duitse en Afrikaanse sintaksis bestaan daar ook wesenlike verskille, soos bv. ten opsigte van die plasing van die onderwerp, wat in Duitse sinskonstruksies dikwels later verskyn as in Ajrikaans. Dit blyk onder andere uit die vergelyking van 'n paar parallelle tekste. 'n Empiriese ondersoek het getoon dat hierdie vertraging van die onderwerp vir Afrikaanssprekendes wat Duits leer, heelwat probleme skep. Hulle vind dit moeilik om sinne met 'n vertraagde onderwerp te verstaan en nfJg moeiliker om self sulke sinne te konstrueer. Enkele praktiese wenke word aan die hand gedoen om hierdie probleme deur doelgerigte onderrig te bekamp.

  18. Quantenfische die Stringtheorie und die Suche nach Weltformel

    CERN Document Server

    Lüst, Dieter

    2011-01-01

    Lässt sich das Verhalten aller Dinge, von den kleinsten Teilchen bis zum Universum, einheitlich beschreiben? Der heißeste Kandidat für die Entwicklung einer Weltformel, die alle physikalischen Phänomene erklären kann, ist die Stringtheorie. Sollte sie sich als richtig erweisen, so würde das unser Verständnis über den Ursprung der Naturgesetze dramatisch verändern. Denn das von uns beobachtete Universum wäre dann vermutlich eine winzige Blase in einem viel größeren Gebilde, dem Multiversum. Um die Stringtheorie und die Idee des Multiversums plausibel zu machen, greift der international bekannte theoretische Physiker Dieter Lüst auf ein Modell zurück: das Leben von Fischen in einem Teich. Eines Tages gelingt es den Fischen, die kleinsten Teilchen zu identifizieren, aus denen alles im Fischteich besteht - eingeschlossen sie selbst. Sie nennen diese Urbausteine Quantenfische, da ihr Verhalten nahelegt, dass sie auch eine Art von Lebewesen sind. Doch der ersten folgt eine weitere Entdeckung der Fisch...

  19. Die rol van persoonlikheidstrekke in die weerstand teen stres

    Directory of Open Access Journals (Sweden)

    Sonja V. R. van Oudtshoorn

    1988-05-01

    Full Text Available The role of personality characteristics in resistance to stress: A study was conducted to establish whether certain personality characteristics contribute to resistance to stress. Rescue brigadesmen, performing dangerous rescue operations in the goldmining industry, served as basis for the study. The sample consisted of 63 current, 56 ex- and 50 non-brigadesmen. Results indicate that brigadesmen, on the basis of their personality structure, are better equipped to cope with stress. Scores on the 16PF show that they have a lower level of interpersonal anxiety (Factor Q4 and that they are more practical (Factor I, emotionally stable (Factor C, and conscientious (Factor G. These findings support existing knowledge of the 16PF. Opsomming Ten einde vas te stel ofdaar sekere persoonlikheidstrekke bestaan wat bydra tot weerstand teen stres, is 'n studie uitgevoer met reddingspanlede, wat lewensgevaarlike reddingsdiens in die goudmynbedryf verrig, as ondersoekgroep. Die streekproefhet uit 63 huidige, 56 oud-reddingspanlede en 50 amptenare, wat nog nooit aan die span behoort het nie, bestaan. Dit blyk dat reddingspanlede, op grond van hulle persoonlikheidstruktuur, beter toegerus is om stres te hanteer. Tellings op die 16PF toon dat hulle oor 'n laervlakvan interpersoonlike angs beskik, (Faktor Q4, dat hulle meer prakties (Faktor I, emosioneel stabiel (Faktor C en konsensieus is (Faktor G. Hierdie bevindinge sluit aan by die reeds bestaande kennis oor die 16PF.

  20. die ontwikkeling van die menslike bewussyn ken wilber se aqal-teorie

    African Journals Online (AJOL)

    sosiale sisteem'. Die eksterne individuele kwadrant (die eksterne enkelvoud) verteenwoordig die uiterlike fisieke ontwikkeling van die individu. Navorsers en teoretici in dié kwadrant is BF Skinner, John Watson, John Locke, en.

  1. Milled Die Steel Surface Roughness Correlation with Steel Sheet Friction

    DEFF Research Database (Denmark)

    Berglund, J.; Brown, C.A.; Rosén, B.-G.

    2010-01-01

    This work investigates correlations between the surface topography ofmilled steel dies and friction with steel sheet. Several die surfaces were prepared by milling. Friction was measured in bending under tension testing. Linear regression coefficients (R2) between the friction and texture...... characterization parameters were tested. None of the height, spacing, material volume, void or segmentation parameters showed good correlations. Developed area, rms surface gradient, relative area and complexity showed strong correlations (R2 > 0.7). For area-scale fractal complexity the correlation increases...

  2. Nuwe patogene in die voedselbedryf

    Directory of Open Access Journals (Sweden)

    M. M. Ehlers

    1996-07-01

    Full Text Available ’n “Nuwe generasie” voedselpatogene het die afgelope jare hul verskyning gemaak en kan 'n ernstige gevaar vir die voedselbedryf inhou. Hierdie organismes is uiters aanpasbaar en bestaande voedselprosesseringstegnieke, veral die verkoeling van voedsel, is nie altyd volkome effektief om hul groei te voorkom nie. Clostridium botulinum tipe E, enterotoksigeniese Eschsrichia coli. Listeria monocytogenes en Aeromonas hydrophila is in staat om in voedsel by 5 °C te groei. Campylobacter jejuni en Brucella kan weer by 5 °C oorleef en 'n derde groep organismes, naamlik Salmonella, Staphylococcus aureus, Vibrio parahaemolyticus en Vibrio vulnificus kan by temperature tussen 5 °C en 12 °C groei en hul teenwoordigheid is ’n aanduiding dat die koueketting verbreek is.

  3. Die Last mit der Lust

    Directory of Open Access Journals (Sweden)

    Lutz Sauerteig

    2004-03-01

    Full Text Available Robert Jütte legt mit Lust ohne Last eine umfassende, allgemeinverständliche und spannend zu lesende Geschichte der Empfängnisverhütung von der Antike bis in die unmittelbare Gegenwart vor.

  4. Planar domain walls in black hole spacetimes

    Science.gov (United States)

    Ficek, Filip; Mach, Patryk

    2018-02-01

    We investigate the behavior of low-mass, planar domain walls in the so-called ϕ4 model of the scalar field on the Schwarzschild and Kerr backgrounds. We focus on a transit of a domain wall through a black hole and solve numerically the equations of motion for a range of parameters of the domain wall and the black hole. We observe a behavior resembling an occurrence of ringing modes. Perturbations of domain walls vanish during latter evolution, suggesting their stability against a passage through the black hole. The results obtained for Kerr and Reissner-Nordström black holes are also compared.

  5. P J Hoedemaker: 'Wat ék bedoel, is die behoud van die kerk'

    African Journals Online (AJOL)

    Dit bly egter die moeite werd om die passie wat uit die lewe van hierdie man vir die kerk van Christus gestraal het, na te vors. Die laaste 20 jaar van die vorige eeu was 'n besonder gespanne tyd in. Nederland, in die Nederlandse kerkgeskiedenis en veral in die Nederlandse. Hervormde Kerk. 1 S S H m X 9 iC n -H T S 16/4 ...

  6. REFRACTORY DIE FOR EXTRUDING URANIUM

    Science.gov (United States)

    Creutz, E.C.

    1959-08-11

    A die is presented for the extrusion of metals, said die being formed of a refractory complex oxide having the composition M/sub n/O/sub m/R/sub x/O/sub y/ where M is magnesium, zinc, manganese, or iron, R is aluminum, chromic chromium, ferric iron, or manganic manganese, and m, n, x, and y are whole numbers. Specific examples are spinel, magnesium aluminate, magnetite, magnesioferrite, chromite, and franklinite.

  7. Einfaches Ortungssystem fuer die Schallemissionspruefung

    OpenAIRE

    Greiff, R.

    1982-01-01

    Zur Ortung von Schallemissionssignalen, auch in dicken Koerpern und ohne Kenntnis der Schallgeschwindigkeit, werden an dem Koerper eine Anzahl von Schallaufnehmern in offener, vorzugsweise linearer Anordnung und/oder in geschlossener, vorzugsweise kreisfoermiger Anordnung befestigt und die Ankunftszeiten der Schallsignale an den einzelnen Aufnehmern gemessen und miteinander verglichen. Fuer die Schallquelle ergibt sich bei n Schallaufnehmern in offener Anordnung eine Ortsaufloesung von 2n-2, ...

  8. Geskiedenis van die Geneeskunde in Pretoria*

    African Journals Online (AJOL)

    31 Jul 1971 ... hou en 'n verbod ingestel op die goOl van afval en mtspan van diere in die strate. Pretorius het daarop die Kerkplein uitgewys wat die middel- punt van die nuwe dorp moes word en Louis Devereux en Jan. H. Visagie het begin om die plein uit te le en 'n kerk bou. Lydenburg het egter nou afgestig en sy eie ...

  9. Ursínus, die opsteller van die Heidelbergse Kategismus, Olevianus ...

    African Journals Online (AJOL)

    In hierdie hoedanigheid het hy 'n leidende aandeel aan die gestal- tegewing van die Calvinistiese kerk van die Palts. Veral met die opstel van die uitgebreide kerkordelike maatreels het sy regsopleiding goed te pas gekom. Met sy uitstaande organisatoriese bekwaamhede het hy in die kerkordenende werk 'n gro-.

  10. Die funksie en boodskap van die 'voorwoord' in 1 Korintiërs

    African Journals Online (AJOL)

    - ging van die evangelie). Soos in 2 Korintiërs en Galasiers ontbreek die getuigskrif oor die gemeente se lewe. Maar ten spyte van die leemte verkry Paulus die ge meente se goedgesindheid met die verwysing na God se ryke gawes aan hulle ...

  11. Die impak en grondwetlikheid van die reg om te staak met ...

    African Journals Online (AJOL)

    Dr Tanya du Plessis

    6 Jul 2009 ... verandering in die werkplek ingestel het verplig word om toe te laat dat die werknemers só voortgaan met hul werk as wat hul sou voordat die verandering ingestel is, tydens die dispuutbeslegting. 84 Seyfarth et al (n 78) 138. 85 Art 1 en 2 van die Conciliation Act 1896; art 95 van die Employment Protection ...

  12. Die geheim van die prediking: om mondig te word | Cilliers | Acta ...

    African Journals Online (AJOL)

    Hierdie artikel gaan uit van die oortuiging dat prediking 'n spraakgebeure is waarin die stem van die prediker - simbool van sy of haar persoonlikheid en spiritualiteit - 'n belangrike rol het om te speel. Die stem van die prediker mag nie misken word in die dinamiese struktuur van kommunikasie nie, en moet inteendeel op 'n ...

  13. Manifestasies van die liefde in Langsaan die vuur (A. H. M. Scholtz)

    African Journals Online (AJOL)

    2 Jan 2010 ... “regeer ”, waardeur van die liefdelose paradigmas elders in die verhaal op hulle kop gekeer word. Teenoor die motief van die moederlike liefde is hy 'n eksponent van die vaderlike liefde, soos geïllustreer deur sy verhouding met Chris. Teacher du Toit is 'n rassis, wat dan ook die rasseklassifikasiesisteem ...

  14. SPE DIE OORNAME VAN DIE HAREM DEUR 'N NUWE KONING. In ...

    African Journals Online (AJOL)

    Test

    voormalige byvrou van Saul; die Septuaginta in die Lucianus-recensie lees egter in vers 7: ,,Saul het n bywyf gehad, wie se naam was Rispa die dogter van Aja, en hy het haar geneem." Die gespasieerde woorde, wat in die Hebreeuse teks nie voorkom nie, is die gewone aanduiding van 'n wettige huwelik, vgl. I Sam.

  15. Die invloed van klimaatverandering op die Suid-Afrikaanse stad en voorgestelde aanpassings

    CSIR Research Space (South Africa)

    Conradie, Dirk CU

    2017-02-01

    Full Text Available intense sonstraling, veral in die somer, wat Suid-Afrika baie geskik maak vir die opwekking van fotovoltaïese krag aan die positiewe kant, maar aan die ander kant moet die straling effektief beheer word in stedelike ruimtes en in geboue. Die...

  16. Die beeld van die opvoeder — 'n groep Opvoedkunde-studente se ...

    African Journals Online (AJOL)

    Erna Kinsey

    Leerders bring 'n groot deel van die dag tydens hulle belangrike vormingsjare in die skool deur — jare wat vir leerders se karaktervor- ming, lewensuitkyk en sukses op die pad vorentoe van deurslag- gewende belang is. Opvoeders het dus deel aan die slypingsproses waar die toekomsgeluk van 'n medemens op die spel ...

  17. oordrag van eiendomsreg in die vulgêre reg in die wes-romeinse ryk

    African Journals Online (AJOL)

    Mnr F Schutte

    Alhoewel algemeen aanvaar word dat die saaklike ooreenkoms sy ontstaan aan Savigny te danke het, kom die vraag by mens op of sy teorie op die Romeinse reg gegrond is. Om vas te stel of enige kenmerke van die saaklike ooreenkoms op enige stadium in die geskiedenis van die Romeinse reg aangetref kan word, ...

  18. Die groot drie: 'n Eeu van spotprente in Die Burger 1915–2015 ...

    African Journals Online (AJOL)

    (Zapiro) het hul eie webruimtes waarop hul werk ook te koop is. Die voortbestaan van spotprente is dus hopelik nie bloot gekoppel aan die lewensvatbaarheid van die gedrukte koerant nie. Die groot drie laat 'n mens met die gevoel dat die hartklop van 'n gemeenskap, hul sosiale omstandighede en politieke ingesteld-.

  19. Die potensiaal van chemies behandelde fluitjiesriet ( Phragmites ...

    African Journals Online (AJOL)

    Die potensiaal van chemies behandelde fluitjiesriet ( Phragmites australis )-hooi in onderhoudsdiete vir skape. 1. Die effek van NaOH-behandeling en ureuminkuiling op inname, verteerbaarheid en rumenkinetika.

  20. Die rol van die onderwys in die handhawing en uitbouing van ons volkskultuur

    Directory of Open Access Journals (Sweden)

    G.J. Jordaan

    1970-03-01

    Full Text Available Op die oog af lyk dit ’n baie maklike onderwerp, maar hoe meer 'n mens daaroor nadink hoe ingewikkelder en omvangryker word die implikasies wat verband hou. Dit is veral so omdat dit hier voor alles gaan om eerste fundamentele uitgangspunte, dit wil sê, om lewens- en wêreldbeskouing. Dit geld van albei komponente — van onderwys sowel as van kultuur.

  1. Ortopedie in die Grieks - Romeinse era

    Directory of Open Access Journals (Sweden)

    Louise Cilliers

    2009-09-01

    Full Text Available Die gevorderde hantering van afwykings van bene en gewrigte, Ortopedie, het in Mesopotamië en veral in antieke Egipte sy ontstaan gehad. Dit was egter die Griekse geneeshere wat in die laat 5de eeu v.C. in die Hippokratiese Korpus ’n merkwaardig doeltreffende samevatting van die ortopediese beroep vasgelê het, waarop vir minstens ’n 1 000 jaar nie beduidend verbeter sou word nie. Gebaseer op die onderskeiding tussen toe en oop frakture en ontwrigtings (lg. met oorliggende velwond, en aansienlik swakker prognose is hierdie afwykings so spoedig moontlik gereduseer (selfs deur middel van meganiese tegnieke, die oorliggende vel met seraatsalf gesmeer en dan met kompresse en verbande geïmmobiliseer. Gedurende die eerste 12 dae is die letsel herhaaldelik weer oopgemaak om die fraktuur of ontwrigting te herbelyn indien nodig. Eers hierna is ferm immobilisasie met onder andere spalke aangebring. Beduidende druk op die letsel is vermy omdat daar geglo is dat dit sepsis en gangreen aanbring. Dit is aanvaar dat genesing 20 dae (by byvoorbeeld voet-, rib- en sleutelbeenfrakture en 40 dae (by been- en bo-armfrakture sou duur. Benewens algemeen geldende prosedures is die spesifi  eke hantering van 18 verskillende frakture en ’n groot aantal ontwrigtings in besonderhede uitgespel. Oor ander ortopediese afwykings soos degeneratiewe artritis en jig verskyn daar min in die Hippokratiese werke, maar later geneeshere in die Romeinse era (bv. Celsus, Soranus, Aretaeus en Galenus het dit wel beskryf. Daar is aanduiding dat die hantering van siektes van gewrigte en bene by die mens (die dissipline van ortopedie in moderne terminologie reeds in antieke Egipte deeglik bestudeer en aangeteken is. 1 Tydens die klassieke era en die Romeinse tyd is beduidende verdere bydraes gelewer. In hierdie studie word die ewolusionêre ontwikkeling van ortopedie as kliniese studierigting in die antieke tyd, onder die loep geneem.

  2. Use of RSP Tooling to Manufacture Die Casting Dies

    Energy Technology Data Exchange (ETDEWEB)

    Kevin McHugh

    2004-07-01

    The technology and art used to construct die casting dies has seen many improvements over the years. However, the time lag from when a design is finalized to the time a tool is in production has remained essentially the same. The two main causes for the bottleneck are the need to qualify a part design by making prototypes (usually from an alternative process), and the production tooling lead time after the prototypes are approved. Production tooling costs are high due to the labor and equipment costs associated with transforming a forged block of tool steel into a finished tool. CNC machining, sink EDM, benching, engraving and heat treatment unit operations are typically involved. As a result, there is increasing interest in rapid tooling (RT) technologies that shorten the design-to-part cycle and reduce the cost of dies. There are currently more than 20 RT methods being developed and refined around the world (1). The "rapid" in rapid tooling suggests time compression for tool delivery, but does not address robustness as nearly all RT approaches are intended for low-volume prototype work, primarily for molding plastics. Few options exist for die casting. An RT technology suitable for production-quality tooling in the time it normally takes for prototype tooling is highly desirable. In fact, there would be no need for a distinction between prototype and production tooling. True prototype parts could be made using the same processing conditions and materials intended for production. Qualification of the prototype part would allow the manufacturer to go directly into production with the same tool. A relatively new RT technology, Rapid Solidification Process (RSP) Tooling, is capable of making production-quality tooling in an RT timeframe for die casting applications. RSP Tooling, was developed at the Idaho National Engineering and Environmental Laboratory (INEEL), and commercialized with the formation of RSP Tooling, LLC (2). This paper describes the process, and

  3. Effect of Die and Punch Radius on Springback of Stainless Steel Sheet Metal in the Air V-Die Bending Process

    Directory of Open Access Journals (Sweden)

    M.S. Buang

    2015-06-01

    Full Text Available This paper focuses on the effect of the die and punch radii on the springback in the air V-die free bending process of stainless steel sheet metal. The experiment was performed on sheet metal using various die and punch radius values while their springback behavior was observed. The design of experiment approach was used in these experiments using the full factorial and analysis of variance methods to identify whether or not the die and punch radii are significant input parameters in predicting springback. From the statistical analysis, it shows that the die and punch radius parameters are significant factors contributing to the springback effect in the V-die bending of stainless steel sheet metal at the significance level of 0.05 because their p-value is less than 0.05. The results from the experiments showed that springback is affected by the die and punch radius values in the air V-bending experiments. From this analysis, it can be concluded that the springback values can be decreased by decreasing the values of the die and punch radii. In the air V-die bending process, the punch radius is the most important factor to be considered. The experimental method agreed well with the design of experiment results.

  4. Die Meting van die verband tussen geslag en konformiteit as groepdinamiese veranderlikes.

    Directory of Open Access Journals (Sweden)

    W. S. de Villiers

    1982-11-01

    Full Text Available The amount and kind of conformity induced by group pressure depend upon the nature of the situation. The nature of the group and the characteristics of the individual. In this particular study the experimental measurement of conformity developed by Asch and Crutchfield was repeated. Confirmation was found that sex operates as one of the determinants of conformity. OpsommingIn die sosiale bedryfsielkunde is die invloed van die groep op die individu een van die vernaamste studieterreine. Die mate waarin ‘n individu konformeer tot groepsdruk hang af van die aard van die situasie, die aard van die groep en die eienskappe van die individu. In hierdie studie is die eksperimentele meting van konformiteit soos ontwikkel deur Asch en Crutchfield herhaal en bevestiging is gevind dat geslag een van die individuele determinante van konformiteit is.

  5. Is the propagation speed of ultrasound in human organs a diagnostic parameter for tissue characterization? Evaluation using the liver parenchyma in children and adolescents as an example; Die Schallleitgeschwindigkeit im menschlichen Gewebe. Ein diagnostisch verwertbarer Parameter? Evaluation am Beispiel der Leber bei Kindern und Jugendlichen

    Energy Technology Data Exchange (ETDEWEB)

    Born, M. [Bonn Univ. (Germany). Radiologische Klinik - Kinderradiologie; Franke, I. [Bonn Univ. (Germany). Kinderklinik

    2011-09-15

    New sonographic machines permit the measurement of the propagation speed of ultrasound (PSU) in humans. The liver seems to be an appropriate organ for examining whether the PSU may be used as a diagnostic parameter for tissue characterization since the liver is easily accessible to sonography and its variable content of fat impacts the PSU. Purpose: To determine whether there is a measurable correlation between obesity and PSU in the liver. Methods: In 69 children and adolescents, the PSU in the liver was measured sonographically and correlated to BMI, age, size and weight of the children. Results: A strong correlation was found between the PSU in the liver and the BMI. The PSU was significantly lower in obese children (1507 m/s) than in children with normal body weight (1564 m/s). Conclusion: PSU seems to be promising as an additional diagnostic parameter for characterizing liver tissue. Further evaluation is necessary. (orig.)

  6. Die spook van Afrikaneridentiteit in Toorberg, Die stoetmeester en Die swye van Mario Salviati (Etienne van Heerden

    Directory of Open Access Journals (Sweden)

    Mariëtte van Graan

    2017-04-01

    Full Text Available Spookkarakters is ’n kenmerkende aspek van Etienne van Heerden se roman-oeuvre, maar tot op hede is weinig navorsing gedoen waarin daar spesifiek na die aard en funksie van hierdie spookkarakters ondersoek ingestel is. In hierdie artikel bespreek ek Van Heerden se gebruik van spookkarakters diachronies, met verwysing na die romans Toorberg (1986, Die stoetmeester (1993 en Die swye van Mario Salviati (2000. Ten einde die aard van spookkarakters uit te klaar, word daar van die sogenaamde paranormale wetenskap gebruik gemaak. Die spoke in die drie betrokke romans word hiervolgens geklassifiseer en binne die konteks van die roman waarin hulle verskyn, bespreek. Hierdeur sal ek aantoon hoe die spookkarakters in dié romans as ’n voortdurend veranderende vergestalting van Afrikaneridentiteit (’n sentrale tema in Van Heerden se oeuvre gelees kan word. Van Heerden se Afrikaner verander oor tyd: in Toorberg vorm die spookkarakters ’n kollektief wat ’n gefragmenteerde beeld van die stereotipiese, argaïese, manlike Afrikaneridentiteit vergestalt; in Die stoetmeester word ’n liminale karakter in ’n liminale historiese tydperk juis só geskryf om ’n liminale Afrikaneridentiteit te vergestalt; en in Die swye van Mario Salviati word daar wegbeweeg van ’n eksklusiewe Afrikaneridentiteit na ’n meer omvattende Suid-Afrikaanse identiteit deur die gebruik van spookkarakters wat ten opsigte van agtergrond en herkoms verskil. Ten slotte sal die historiese kontekste van die romans en die identiteite daarin vergelyk en bespreek word ten einde die funksie van Van Heerden se spookkarakters as voortdurende herskrywings van Suid-Afrikaanse identiteite uit te lig.

  7. In die grot van die sibille. Juanita Louw. Kaapstad: Queillerie, 2016 ...

    African Journals Online (AJOL)

    Ook op die program die harlekinade. Die nar in reënboogtooisel werwel sy Al Debbo-oë elk om 'n spil. Ons skater vir sy bont mimiek, sy hart oor sy hele lyf gespeld. In die derde afdeling is die gedig “Sirkel” bewys van Louw se verstegniese vaar- dighede. In die gedig verwoord die sprek- er haar nadoodse metamorfose van ...

  8. Die resepsie van die Heidelbergse Kategismus (Sondag 17 en 22 insake die opstanding in die Nederduitse Gereformeerde Kerk sedert 2000 (Deel 2

    Directory of Open Access Journals (Sweden)

    Johannes W. Hofmeyr

    2013-06-01

    Full Text Available Met die 450e herdenking van die Heidelbergse Kategismus as vertrekpunt, word met die huidige en die vorige artikel gepoog om lig te werp op die plek, die rol en die interpretasie van die opstanding van Jesus Christus in veral Sondag 17 en 22, spesifiek in die konteks van twee besondere eras in die Nederduitse Gereformeerde (NG Kerk. In die vorige artikel is allereers ’n bespreking gevoer oor die Heidelbergse Kategismus (HK. Daar is gekyk na die resepsie van die betrokke HK-geloofsartikels in die era van Andrew Murray, spesifiek teen die agtergrond van die negentiende-eeuse liberale teologie in Nederland. In die huidige artikel word soortgelyk gekyk na die resepsie van die betrokke HK-geloofsartikels in die NG Kerk na 2000, teen die agtergrond van die herverskyning van die negentiende-eeuse liberale teologie in die vorm van die Jesus Seminaar, die Nuwe Hervorming en ondersteuners daarvan binne die NG Kerk. Sowel die negentiende-eeuse liberale stryd in die NG Kerk asook die stryd oor die opstanding in die NG Kerk van die eerste dekade van die een-en-twintigste eeu, soos verder in hierdie artikel sal blyk, was gekenmerk deur kontekstueelbepaalde uniekhede. Die gemene deler was dat albei deel was van tye van teologiese vrysinnigheid. In die lig van hierdie bespreking word tot die gevolgtrekking gekom dat die NG Kerk tans, betreffende haar identiteit as gereformeerde kerk waarskynlik in ’n kritieke geloofs- en toekomskrisis verkeer. Dit impliseer kommerwekkende gevolge vir haar Skrifverstaan en getuienis as belydenis en belydende kerk van Jesus Christus en haar toekoms. Alleen duidelike visie, verantwoordelike leierskap en ’n herontdekking van die verlossingskrag van Christus se kruis en opstanding sal herstellende, positiewe en dinamiese oplossings kan bied om sodoende die NG Kerk te red van ’n snelwentelende afwaartse spiraal.With the 450th celebrations of the origin of the Heidelberg Catechism (HC in mind, the main aim of this and the

  9. die helikopter as troepedraer in konvensionele lugoperasies

    African Journals Online (AJOL)

    tiese scenario World War 3 word 'n geringe rol aan die transporthelikopter toegeken; hiervolgens sal helikopters in die Lynx-reeks gebruik work vir klein vegspanne se taktiese aanwending.27. Hierdie beskouing stem feitlik ooreen met die van sir John Hackett wat die helikopter hoofsaaklik as lugmobiele geskut tipeer.28.

  10. Kerkreg? Die plek van Kerkreg en Kerkregering

    African Journals Online (AJOL)

    p1243322

    25 Jul 2006 ... Artikel XXX). Die verhouding tussen plaaslike gemeente en sinode het een van die mees brandende kwessies in kerkregtelike sin gebly tot op hede. Soms word die gemeente swaarder beklemtoon en andersyds raak sinodes en hulle kommissies nie maklik gewoond aan die gesag wat hulle meen om.

  11. Art. XXIX van die Nederlandse geloofsbelydenis

    Directory of Open Access Journals (Sweden)

    C. van der Waal

    1978-06-01

    Full Text Available Daar word allereers gespreek oor die noodsaak om ‘diligemment’ en ‘avec bonne prudence par la parole de Dieu’ te onderskei wat die ware kerk is. Die eerste Nederlandse teks gee die belydenis aldus: “Wy ghelooven, dat men moet neerstelicken onderscheiden met goeder wijsheyt by den woorde Gods, welcke de rechte ende ware kerk sy”.

  12. Apologie vir die Christelike lewenswyse en etiek

    African Journals Online (AJOL)

    p1243322

    'n Lewe in twee ryke. • 'n Eskatologiese bestaan (konsentrasie op die eindoordeel). • 'n Lewe van liefde wat minstens die volgende insluit: Diakonale deernis en sorg en die verwerping van 'n aristokratiese lewenshouding. 3.1.2 Verdere aspekte van die Christelike lewe uit ander vroeg-. Christelike geskrifte. •. Bereidheid tot ...

  13. Eenheid en verskeidenheid in die insek legioene.

    Directory of Open Access Journals (Sweden)

    P. A.J. Ryke

    1960-03-01

    Full Text Available Geen ander groep diere is so intiem ingeweef in die ingewikkelde kompleks van die biologiese wêreld as die insektenie. Die oorgrote meerderheid vanhulle het ’n terrestriële leefwyse, maarsommige het hulle tog ook in varswater-habitatte tuisgemaak.

  14. Die verhouding Bybelse teologie en dogmatiese teologie

    African Journals Online (AJOL)

    mente verkry is nie. Hierdie ontwikkeling het natuurlik die vraag na die verhouding tussen die testamente akuut gemaak en tot vandag toe steeds brandend gehou. Verskeie antwoorde is aangebied waarmee of vir algehele diskontinuïteit of vir kontinuiteit besluit is, of na 'n mid- deweg gesoek is met die aanvaarding van ...

  15. DIE MAPOCH.OORLOG,1882-1883

    African Journals Online (AJOL)

    skate is oor en weer geskiet, maar sander groat lewensverliese aan Boerekant. Heelwat Nd- zundza-krygers is deur die Boere in die klip- skeure vasgekeer wat suksesvol met dinamiet toegeskiet is.43Die kop self kon nie ingeneem word nie. Veldkornet S.J. Roos, 'n Amajuba- held, is tydens die skermutselings doodgeskiet.

  16. uniform van die staatspresidentswag - herkoms en tradisie

    African Journals Online (AJOL)

    het grof en lelik vertoon, en daar is op die fyner offisierste- wels besluit. Aangesien daar nie sulke stewels beskikbaar was nie, is bruin stewels swart ge- maak vir gebruik deur die skildwagte. 'n Bruin skynsel was egter steeds sigbaar, en daar moes dus spesiaal swart stewels vir die SP Wag ver- vaardig word. Aangesien die ...

  17. Die verband tussen kreatinienopruiming en glomerulere ...

    African Journals Online (AJOL)

    1 Sep 1990 ... die ondersoek was om die gebruik van radio-isotope, en wel radio-gemerkte natriumchromaat etileendiamientetra-asynsuur. (51Cr-EDTA) in kritiek siek pasiente te evalueer. Metode. Studieformaat. In die studie is gebruik gemaak van 10 paslente in die eenheid by Pelonomi-hospitaal, wat elkeen in 3 fases ...

  18. Walter Schmithals se ^Die Gnosis in Korinth

    African Journals Online (AJOL)

    hy nie kan voorstel nie, die onmoontlikheid te bewys nie. Die onvoorstelbare liggaamlose lewe hoef nie nog ontken te word nie, want die onvoorstelbaarheid ontken dit klaar. Indien Paulus sou probeer om die onmoontlikheid van 'n lewe sender liggaam te bewys, sou sy opf)onente hom van 'n gebrek aan gnosis beskuldig,.

  19. Die «ASEAN-Wirtschaftsgemeinschaft»

    DEFF Research Database (Denmark)

    Juego, Bonn

    2014-01-01

    Entwicklungsstufen, wie sie unterschiedlicher kaum sein können. Der Autor, Bonn Juego, nimmt die ASEAN Vision 2020 sowie die Debatten, die diesbezüglich in den einzelnen Ländern geführt werden, unter die Lupe. Er geht dem Potenzial des ASEANAnsatzes zu sozialer Teilhabe und wirtschaftlicher Verteilungsgerechtigkeit...

  20. DIE NORMERING VAN AFRIKAANSE TAALGEBRUIK SOOS ...

    African Journals Online (AJOL)

    toe te sien dat die leerlinge teg spel en skryE. Die taalonderwyser het ge«oonlik minstens 'n wootdeboek wat a^j^bcon gebruik word. VecaL in die hoer standerds word allerlei woordeboeke gebcuik asook die Afrikaanse woordelys en spclreels van S.A. Akademie vir Wetenskap en Kuns, en dikwels ook lyste spelwoorde en ...

  1. Die Ökonomik der Reputation

    OpenAIRE

    Tegtmeyer, Jan C.

    2005-01-01

    Gegenstand dieser Arbeit ist die Betrachtung der Reputation eines Unternehmens aus ökonomischer Sicht. Die Zusammenfassung von Beurteilungen der Unternehmensaktivitäten durch wirtschaftlich relevante Interessengruppen bildet eine Unternehmensreputation. Die Reputation wird hier mit einem betriebswirtschaftlichen Kosten-Nutzen Kalkül betrachtet. Nur mit einer Reputation, die durch eine vorteilhafte Beurteilung der Unternehmensleistung entsteht, kann ein Unternehmen wirtschaftliche Vorteile gen...

  2. Is kerkvereniging vandag of in die toekoms 'n doelwit?

    African Journals Online (AJOL)

    Die eenheid van die kerk bestaan in die geloof. Vir die ongelowige (= die wêreld) is die eenheid van die kerk onsigbaar, maar vir hom wat met ems kan sê credo unam sactam ecclesia is die kerk één. Die Reformatore het egter geëis dat elkeen hom by die ware kerk moes voeg. Dit beteken dat die kerk tog ook sigbaar moet ...

  3. Leerteoretiese basis van die andragogie

    Directory of Open Access Journals (Sweden)

    C. J. A. Simpson

    1991-06-01

    Full Text Available Learning theory basis of andragogy. A cursory glance at andragogy creates the impression that humanistic learning theory plays an all encompassing role in the learner centered approach andragogy espouses. A closer look, however, reveals that Knowles (1973, after having made an intensive study of learning theory, created an extensive framework within which human resource development can take place. The fact that Knowles attracted critique from different areas, led to a need to ascertain the role different learning theories, if any, played in the emergence of andragogy. Having looked at the assumptions displayed by the andragogical approach, as well as a comparison of different learning theories and their connection with andragogy, it became clear that andragogy contains elements of various learning theories in an adapted way. These adaptations resulted in an approach to adult education in which learners are given the opportunity to be part of the learning process in such a way that they themselves contribute to the development which takes place. Opsomming Met 'n eerste oogopslag wil dit voorkom asof humanistiese leerteorie 'n oorheersende rol in die leerdergesentreerde benadering van andragogie speel. By nadere ondersoek blyk dit egter dat Knowles (1973, na 'n deeglike studie van verskillende leerteoretiese beginsels, 'n omvangryke raamwerk geskep het waarbinne, aan die hand van verskeie aangepaste leerteoretiese beginsels, menslike hulpbronontwikkeling kan plaasvind. As gevolg van die feit dat Knowles vanuit verskillende oorde kritiek op die lyf geloop het, is besluit om die rol wat verskillende leerteorieë in andragogie speel, te bestudeer. Dit blyk dat andragogie nie net elemente van verskillende leerteorieë bevat nie, maar dat toepaslike aspekte van die teoriee wat ondersoek is, benut en aangepas is om 'n geintegreerde benadering te bewerkstellig waarin veral volwassene-leerders by leergeleenthede en hulle selfontwikkeling betrek word.

  4. Die teologiese debat: Die waarde of betekenis daarvan

    African Journals Online (AJOL)

    Conciliorum oecumenicorum decreta. Herder: Basel. Baigent, M & Leigh, R 1992. The Dead Sea scrolls deception. Reading: Cox & Wy man Ltd. Bernhart, J (Hrsg) 1954. Thomas von Aquino. SummederTheologie. Stuttgart: Al fred Kroner Verlag. Von Campenhausen, H F 1956. Die Griechische Kirchenvater. Stuttgart: Kohl-.

  5. Protesoptogte en die rol van die Nederduitsch Hervormde Kerk

    African Journals Online (AJOL)

    spruch und in einer Rechtspraxis und Gesetzgebung zu bewáhren, die Freiheit und. Lebensmóglichkeit der schwáchsten Glieder der Gemeinschaft respektiert und sichert. In ihrer Unabdingbarkeit ist diese Forderung fiir sie alle gottlichen Ur- sprungs. Ihre Verletzung fiihrt daher zu Heimsuchung und Untergang der Gesell-.

  6. die eerste vrydeidsoorlog: enkele aspekte mbt die britse siening van ...

    African Journals Online (AJOL)

    of obstinate, almost fanatical, old Dutchmen, whom one cannot help rather admiring, and who will sacrifice everything and abandon their farms rather than to live under the British flag, or, indeed under any form of government but their own'.? Toe die eerste skate op 16 Desember 1880 by. Scientia Militaria, South African ...

  7. Die ontmaskering van die bose: Eksegetiese perspektiewe op ...

    African Journals Online (AJOL)

    p1243322

    te kommunikeer.9 Wanneer hierdie vermoëns ontleed word, gee hulle in die .... The language of the text – its discourse, the word of God – is the ..... analysis of the content. ...... Revelation unsealed: A narrative critical approach to John's.

  8. Die funksie van die ^danksegging(s)' in 1 Tessalonisense

    African Journals Online (AJOL)

    die besonder van 1 Tessalonisense 2:13-16, gee Schmidt (1983:269-279), Pearson. (1971:79-94), Best ...... exigence which can be completely or partially removed if discourse, introduced into .... The form critical study of Paul's letters: 1 Thessalonians as a ... Toward an interactional model for the analysis of letters. Neo-.

  9. Die plek van Empedokles in die metafisies-mistieke tradisie

    African Journals Online (AJOL)

    p1243322

    Peter Kingsley which seems to draw Empedocles closer to. Buddhism, but without explicating this implication of his reception. 1. PROBLEEM EN BENADERING ... fragmente (ongeveer 450 reëls). Dit is nie bekend in welke volgorde hierdie twee gedigte ontstaan het nie. Wat wel vas staan, is dat die eerste (esoteriese.

  10. Fully developed magnetohydrodynamic flows in rectangular ducts with insulating walls

    Energy Technology Data Exchange (ETDEWEB)

    Molokov, S. [Kernforschungszentrum Karlsruhe GmbH (Germany). Inst. fuer Angewandte Thermo- und Fluiddynamik (IATF)]|[Kernforschungszentrum Karlsruhe GmbH (Germany). Projekt Kernfusion; Shishko, A. [AN Latvijskoj SSR, Riga (Latvia). Inst. Fiziki

    1993-10-01

    In the first part the effect of magnetic field inclination on the flow structure and the pressure drop is considered. The duct walls are insulating. An asymptotic solution to the problem at high Hartmann numbers is obtained. The results show that for a square duct the increase of the pressure gradient due to the field inclination is negligible (less than 10% for any angle). For blanket relevant values of inclination of up to 10 the deviation of the velocity profile from the slug profile is insignificant. The second part studies the flow in a duct with insulating walls parallel to the magnetic field, while the Hartmann walls are covered by an insulating coating. A new type of the boundary condition is derived, which takes into account finite coating resistance. The effect of the latter on the flow characteristics is studied. An exact solution to the problem is obtained and several approximate formulas for the pressure drop at high Hartmann numbers are presented. (orig./HP) [Deutsch] In ersten Teil wird der Einfluss der Magnetfeldneigung auf die Stroemungsform und den Druckverlust betrachtet. Die Kanalwaende sind isoliert. Fuer grosse Hartmann-Zahlen wird eine asymptotische Loesung des Problems hergeleitet. Die Ergebnisse zeigen, dass fuer einen quadratischen Kanal die Erhoehung des Druckverlusts aufgrund der Magnetfeldneigung vernachlaessigbar ist (weniger als 10% fuer beliebige Winkel). Fuer blanket-relevante Neigungen bis 10 ist die Abweichung des Geschwindigkeitsprofils vom kolbenfoermigen Profil nur unbedeutend. Im zweiten Teil wird eine Stroemung in einem Kanal untersucht, dessen Waende parallel zum Magnetfeld isoliert sind, waehrend die Hartmann-Waende mit einer Isolationsschicht ueberzogen sind. Es wird eine neue Randbedingung hergeleitet, die einen endlichen Widerstand der Beschichtung beruecksichtigt. Ihr Einfluss auf die Stroemungsformen wird untersucht. Es wird eine exakte Loesung des Problems entwickelt. Fuer grosse Hartmann-Zahlen werden mehrere

  11. Die design and process optimization of plastic gear extrusion

    Science.gov (United States)

    Zhang, Lei; Fu, Zhihong; Yao, Chen; Zang, Gongzheng; Wan, Yue

    2018-01-01

    The flow velocity of the melt in the extruder was simulated by using software Polyflow, and the size of the die channel with the best flow uniformity was obtained. The die profile shape is obtained by reverse design. The length of the shaping section is determined by Ansys transient thermal analysis. According to the simulation results, the design and manufacture of extrusion die of plastic gear and vacuum cooling setting were obtained. The influence of the five process parameters on the precision of the plastic gear were studied by the single factor analysis method, such as the die temperature T, the screw speed R, the die spacing S, the vacuum degree M and the hauling speed V. The optimal combination of process parameters was obtained by using the neural network particle swarm optimization algorithm(T = 197.05 °C, R = 9.04rpm, S = 67mm, M = ‑0.0194MPa). The tooth profile deviation of the extruded plastic gear can reach 9 level of accuracy.

  12. Die Freunde im und die Freude am Fernsehen

    Directory of Open Access Journals (Sweden)

    Amina Ovcina Cajacob

    2012-09-01

    Full Text Available Das Ziel der vorliegenden Arbeit besteht darin, die Wirkungen von Popstars und Popbands auf Jugendliche (13- bis 17-Jährige zu erforschen. Im Mittelpunkt der Interessen steht die Frage, welche Wirkungen aus der Rezeption von Musiksendungen (bzw. Videoclips von Musiksendern entstehen und welche Charakteristika innerhalb der aufgebauten Beziehungen zu den Stars bemerkbar sind. Andererseits wurden die Unterschiede und Parallelen zwischen parasozialen Beziehungen zu den Stars und orthosozialen Beziehungen aufgezeigt. Im Zusammenhang mit der empirischen Untersuchung bezieht sich die Autorin auf den Uses-and-Gratifications-Approach, wobei die bedürfnissbefriedigenden Wirkungen von Musikkanälen und den dazu gehörigen Popstars im Mittelpunkt stehen. Mit Hilfe des Uses-and-Gratifications-Approach wird angenommen, dass das Konsumieren der Musiksendungen und der Musikstars von den Jugendlichen gezielt zur Befriedigung bestimmter Bedürfnisse eingesetzt wird.The objective of this study is to explore the effects of pop stars on adolescents (aged between 13 and 17. The focus of interest is the question what effect music channels (i.e. video clips from music channels produce and what characteristics are noticeable from the formed relationship between adolescents and pop stars. On the other side, parallels and differences have been drawn between the para-social relationships to pop stars and ortho-social relationships. In connection with empirical study, the author also refers to Uses-and Gratification-Approach where the need satisfying effects of music channels and pop stars are in focus. With the help of Uses-and Gratification-Approach it will be assumed, that aim of watching music channels and therefore pop stars will be pointed toward the gratification of specific needs.

  13. Chirurgie in die Grieks-Romeinse era

    Directory of Open Access Journals (Sweden)

    François P. Retief

    2006-09-01

    Full Text Available In die Grieks-Romeinse era het mediese behandeling kenmerkend uit drie elemente bestaan, naamlik regimen (dieet en gesonde leefwyse, geneesmiddels en chirurgie – laasgenoemde alleen toegepas indien regimen en geneesmiddels onsuksesvol was. Bewyse van primitiewe chirurgie dateer terug na die Bronstydperk, en in Homerus se eposse is heelwat vermelding van die chirurgiese hantering van oorlogswonde, met tussenkoms van die gode. Met die koms van empiriese geneeskunde in die 5de eeu v.C. het chirurgie in die Hippokratiese Corpus prominent gefigureer met beduidende bydraes in veral die ortopediese veld en hoofbeserings. Uitbouing van anatomiese en fisiologiese kennis, gebaseer op disseksie van menslike kadawers in Alexandrië vanaf die laat 4de eeu v.C., het chirurgie ’n hupstoot gegee. Teen die Romeinse era vanaf die 2de eeu v.C. het snykundetegnieke (en -instrumente beduidend verbeter, maar is steeds oorwegend deur Griekse geneeshere beoefen. Van geneeshere is steeds verwag om al drie bovermelde terapeutiese modaliteite te bemeester, maar chirurgie het meer aansien verwerf en daar is al meer in onderafdelings van chirurgie soos oogheelkunde, vrouesiektes en verloskunde, blaaskwale en mond- en keelsnykunde gespesialiseer. Militêre geneeskunde was in die Romeinse Ryk ’n belangrike aktiwiteit, en het veral traumachirurgie uitgebou. Betreding van die buik- en toraksholtes was nie meer noodwendig fataal nie, en veeartsenykunde het tot stand gekom. Die eerste beduidende chirurgiehandboek ná die Hippokratiese Corpus is in die 1ste eeu n.C. deur Celsus opgestel. Vanaf die 3de eeu het die chirurgieberoep min vordering gemaak, die beroepstaal het mettertyd van Grieks na Latyn verander en kundigheid is later veral deur Islam-geneeshere na die Middeleeue en later oorgedra.

  14. Reformasie: John Knox, Die Skotse Calvinis* 2

    Directory of Open Access Journals (Sweden)

    V. E. d'Assonville

    1959-03-01

    Full Text Available Na negentien maande van onophoudelike stryd en nood, word John Knox gedurende Februarie 1549 van die wrede Franse galeiskip losgelaat. Hierop begeef die liggaamlik gebroke hervormer hom na Engeland, omdat Skotland nog te onveilig was, Die Rooms-Katolieke party het sake aldaar so onder die kiel gehad, dat ’n deurbraak van die Hervorming menslik gesproke op hierdie tydstip onmoontlikwas.

  15. Ferroelectric charged domain walls in an applied electric field

    OpenAIRE

    Gureev, M. Y.; Mokry, P.; Tagantsev, A. K.; Setter, N.

    2012-01-01

    The interaction of electric field with charged domain walls in ferroelectrics is theoretically addressed. Ageneral expression for the force acting per unit area of a charged domain wall carrying free charge is derived. It is shown that, in proper ferroelectrics, the free charge carried by the wall is dependent on the size of the adjacent domains. As a result, the mobility of such domain wall (with respect to the applied field) is sensitive to the parameters of the domain pattern containing th...

  16. Normatiwiteit versus neutraliteit in die handelswetenskappe

    Directory of Open Access Journals (Sweden)

    W. J. Venter

    1974-03-01

    Full Text Available Die sondeval van die mens het ’n tydperk van stryd ontsluit; dit is die stryd tussen die mag van die lig en die mag van die duisiternis wat hom telkens in nuwe en meer manifestasies openbaar het. Daarom kon die Collegium Studiosorum Veritas van die Utrechtse Universiteit in die voorwoord tot die bundel voordragte wat by geleentheid van sy 12e lustrum onder die titel „Geloof en Wetenschap” gehou is, as volg verwys na die openbaring van hierdie stryd op wetenskapsterrein: „Sinds tientallen jaren immers is de verhouding tussen geloof en wetenschap het vraagstuk, waarmee generaties van Christelijke wetenschapsbeoefenaars en studenten hebben geworsteld. Aan dit onderwerp zijn tallose redevoeringen en eindeloze debatten gewijd sedert de natuurwetenschappen in de laatste helft van de vorige eeu zulk een overweldigende vlucht namen. De verbazing, die de mens vervulde toen hij ontdekte welke mogelijkheden er in de natuur verborgen lagen, zwol aan tot een hybris, die God dood verklaarde en de hemel onbewoond”.

  17. Die Eigenschaft der Violinspielstechnik von C.Flesch : "Die allgemeine Technik" auf den Schwerpunkt legend

    OpenAIRE

    髙旗, 健次

    2015-01-01

    Um die Behauptung über die Kunst des Violinspiels von Carl Fresch zu systematisieren und anzuordnen, fokussiere ich mich auf “Die allgemeine Technik” als den Ausgangspunkt der von ihm vorgeschlagenen drei Säulen, “Die allgemeine Technik”, “Die angewandte Technik” und “Das künstlerische Spiel”. Über die Technik mit dem linken Arm hat er entdeckt, dass zwar das Geigenspiel “selbst das Intervall zu bestimmen fordert”, aber die linken Finger dies nicht bestimmen, sondern die Formen oder Bewegunge...

  18. TYD AS GAWE – GOD SE TYD: DIE POLSSLAG VAN DIE KERKJAAR

    African Journals Online (AJOL)

    middel van simbole, kleur en beelde geskied, word die Woord verkondig deur variasie én 'n geheel van kommunikasie op verskillende vlakke. So word die wesenlike van ons geloof binne die verloop van tyd verkondig en sigbaar gemaak – tot gestalte gebring. Die Kerkjaar bied dus die basis en struktuur vir verskeidenheid ...

  19. Die taak van akademiese geletterdheid/hede binne die konteks van ...

    African Journals Online (AJOL)

    Streit der Fakultäten2 wat in 1798 deur Immanuel Kant gepubliseer is. Kant se teks dateer uit. 'n tydperk van groot sosiale verandering gedurende die vroeë fases van die industriële revolusie toe die onderwysstelsel van die Middeleeue uitgedien geraak het en vernuwing nodig was. Een van die belangrikste veranderings ...

  20. Ses van die een en 'n halfdosyn van die ander? | van Dyk | Journal ...

    African Journals Online (AJOL)

    Uit die studie behoort dit duidelik te wees of daar grootskaalse oorvleueling tussen CAPS aan die een kant en TAG en die AGLA121-module aan die ander kant is en of ʼn module in Akademiese Geletterdheid noodsaaklik is vir alle leerders op eerstejaarsvlak, omdat dit fokus op aspekte wat nie deur die skoolsillabus gedek ...

  1. die lewenswyse yan die suid. afrikaanse jeug yanaf 1652 tot yoor ...

    African Journals Online (AJOL)

    sigheid van aile militere-operasies vanwee die rustiger toestande wat geheers het. Vanaf April het 'n brutale gees hom onder sommige van die rowerbendes geopenbaar. Op 8 Mei 1811 word berig ontvang van die moord op die twee Slab- ber broers. Pieter en Nicolaas was op die trek- pad toe hulle deur 'n bende swartes ...

  2. Die beeld van die opvoeder — 'n groep Opvoedkunde-studente se ...

    African Journals Online (AJOL)

    Erna Kinsey

    ders geskenk het, en "almal, al was jy nie 'n Picasso nie, spesiaal laat voel het." Dit is vir die deelnemers belangrik dat opvoeders moeite moet doen om die leerders werklik te leer ken. Sewe van die deelnemers noem dat die opvoeders al die leerders in hulle klas as unieke mense met eie persoonlikhede gesien het.

  3. die kasteel••de goede hoop" (1921.1923): die verhaal van in ...

    African Journals Online (AJOL)

    oor die beoogde opknapping van die Kat-pui of portico, soos dit in die in Engels opgestelde argiefstukke genoem is. begin met 'n skrywe van die Kaapstadse distrikingenieur,. Departement van Openbare. Werke. aan die sekretaris van genoemde departement van 30 November 1922 waarin eersgenoemde o.m. na mnr.

  4. Die ideologíese funksie van niimte in die Markus-vertelling: 'n ...

    African Journals Online (AJOL)

    Die verteller se gebruik van belangeruimte tree daarom as draer van sy ideo logiese persfwktief op. Soos in die geval van die verteller se aanwending van tyd in sy vertelling (kyk weer Van Eck 1990:159-185), bring sy aanwending van ruimte ons ook om die ideologiese pterspektief van die Markus-vertelling te sien as ...

  5. Interfacial heat transfer behavior at metal/die in finger-plated casting during high pressure die casting process

    Directory of Open Access Journals (Sweden)

    Wen-bo Yu

    2017-07-01

    Full Text Available Heat transfer at the metal-die interface has a great influence on the solidification process and casting structure. As thin-wall components are extensively produced by high pressure die casting process (HPDC, the B390 alloy finger-plate casting was cast against an H13 steel die on a cold-chamber HPDC machine. The interfacial heat transfer behavior at different positions of the die was carefully studied using an inverse approach based on the temperature measurements inside the die. Furthermore, the filling process and the solidification rate in different finger-plates were also given to explain the distribution of interfacial heat flux (q and interfacial heat transfer coefficient (h. Measurement results at the side of sprue indicates that qmax and hmax could reach 9.2 MW昺-2 and 64.3 kW昺-2昁-1, respectively. The simulation of melt flow in the die reveals that the thinnest (T1 finger plate could accelerate the melt flow from 50 m晄-1 to 110 m晄-1. Due to this high velocity, the interfacial heat flux at the end of T1 could firstly reach a highest value 7.92 MW昺-2 among the ends of Tn (n=2,3,4,5. In addition, the qmax and hmax values of T2, T4 and T5 finger-plates increase with the increasing thickness of the finger plate. Finally, at the rapid decreasing stage of interfacial heat transfer coefficient (h, the decreasing rate of h has an exponential relationship with the increasing rate of solid fraction (f.

  6. Die gebruik van die Delphi-tegniek vir die ontwikkeling van kriteria vir die beoordeling van kurrikula vir transkulturele verpleging

    Directory of Open Access Journals (Sweden)

    Susanna CD Zeelie

    1996-12-01

    Opsomming Verpleegkundiges benodig spesifieke opieiding om bemagtiging vir die lewer van kultuur-kongruente sorg te ontvang. In hierdie artikel word kriteria rakende transkulturele verpleegkundige inhoud vir insluiting in Verpleegkunde kurrikulu opgestel. *Please note: This is a reduced version of the abstract. Please refer to PDF for full text.

  7. How Tycho Brahe really died

    DEFF Research Database (Denmark)

    Jacobsen, Aase Roland; Petersen, Lars

    2001-01-01

    In 2001 we commemorate the 4th centenary of the death of Tycho Brahe, perhaps the first great scientists in a modern sense.This famous Danish astronomer died in Prague on the 24th of October 1601, eleven days after he had attended a banquet at the Bohemian count of Rosenberg. Tycho was too courte...

  8. Welches Geschlecht hat die Avantgarde?

    Directory of Open Access Journals (Sweden)

    Gertrud Lehnert

    2000-07-01

    Full Text Available Das Buch betrachtet das Theater der französischen und amerikanischen ‚Avantgarde‘ der Moderne und Postmoderne unter dem Aspekt des Geschlechts: Welcher Verfahren bedient sich avantgardistische Kunst, ist avantgardistische Kunst in geschlechtlicher Hinsicht restriktiv, oder ermöglicht sie die subversive feministische oder auch lesbisch-schwule Ausformung spezifischer Formen?

  9. Editorial/Van die Redaksie

    African Journals Online (AJOL)

    1990-10-06

    Oct 6, 1990 ... For every child who dies of injuries, there are many more who are maimed and often disabled. In addition, the hidden morbidity in paediatric trauma may only manifest years after the injury, not only as physical disability but also as changes in cogni- tion, personality and behaviour, and as stress on.

  10. Aanbid die godsdienste dieselfde God?

    African Journals Online (AJOL)

    timidity or of anxiety on the part of the Christians in South Africa. A di stinction should be made between worship in the church and prefers in a worldly situation. 1. ..... Wolfhart Pannenberg is as moderne apologeet, sterk gekant teen 'n teologie soos die van Barth wat volgens horn in 'n esoterisme verval. Hy wil op rasionale.

  11. Metodes in die Christelike etiek

    African Journals Online (AJOL)

    - eeuse etiek, wat 'n geestelike lewe hoer geag het as 'n liggaamlike lewe, vanweë 'n dualistiese mensbeskouing (Frey 1989:26, 27) en teen die denke van Aristoteles. Aristoteles het geleer dat 'n mens geregverdig word deur reg te doen.

  12. Die Suche nach den Gottesteilchen

    CERN Multimedia

    2007-01-01

    2008 wird der größte jemals gebaute Teilchenbeschleuniger in Betrieb genommen Anlässlich des Mathematik-Jahres 2008 hat der Experimentalphysiker der Universität Hamburg und der designierte Generaldirektor des europäischen Zentrums für Teilchenphysik CERN in Genf, Rolf-Dieter Heuer, die Bedeutung des Dialogs zwischen Naturwissenschaftlern und Philosophen hervorgehoben.

  13. Verskuiwing van teologiese denke oor die huwelik vanaf Luther tot ...

    African Journals Online (AJOL)

    Test

    spesifieke manier van dink oor die rol van die huwelik asook die rolle van vrou en man in die huwelik te ..... dink oor die posisie van die vroue en sy fokus op die ervaring van die geloof, dat. Schleiermacher deur ...... Browning, D.S., 2007, Equality and the family, Kindle edn., W.B. Eerdmans, Grand Rapids, MI. Bouwman, H.

  14. Dogmatiek en Christelike Etiek binne die Fakulteit Teologie (Afd A ...

    African Journals Online (AJOL)

    mee die teologie hom besig hou nie kan verhinder dat die spore wat die teologiese denke in die tyd nalaat sterk ooreenkomste met die denke van die tyd vertoon nie. (du Toit 1988:36) bly dit ook waar dat daar steeds geworstel word met die sistema- tiese deurdenking van die heil wat daar in Christus is (Berkhof 1982:13).

  15. DIE PREDIKANT: DIENAAR VAN GOD OF NET 'N GEWONE ...

    African Journals Online (AJOL)

    admin

    kan ook 'n curriculum vitae van enige kandidaat op die groslys aanvra.32 Die doel hiervan is om seker te maak dat die regte persoon wat die beste aan die gemeente se behoeftes kan voldoen, na die gemeente beroep sal word. In hierdie opsig verskil die beroeping geensins van die aanstelling van enige werk- nemer by ...

  16. DIE SLUIPOORLOG IN SUID-AFRIKA EN CHINA

    African Journals Online (AJOL)

    (2) Die Lang Mars van die Kommunis- tiese stryders onder leiding van Mao van Suidoos-China na Noordwes-China. 18Oktober 1934tot Oktober 1935. (3) Die stryd van 'n onwillige bondge- nootskap tussen die Kuomintang en die. Chinese Kommuniste teen die Japanse invallers, 1937-45. (4) Die hervatte stryd tussen die ...

  17. Holes in the walls: Primordial black holes as a solution to the cosmological domain wall problem

    Science.gov (United States)

    Stojkovic, Dejan; Freese, Katherine; Starkman, Glenn D.

    2005-08-01

    We propose a scenario in which the cosmological domain wall and monopole problems are solved without any fine tuning of the initial conditions or parameters in the Lagrangian of an underlying filed theory. In this scenario domain walls sweep out (unwind) the monopoles from the early universe, then the fast primordial black holes perforate the domain walls, change their topology and destroy them. We find further that the (old vacuum) energy density released from the domain walls could alleviate but not solve the cosmological flatness problem.

  18. Charged Domain Walls

    OpenAIRE

    Campanelli, L.; Cea, P.; Fogli, G. L.; Tedesco, L.

    2003-01-01

    In this paper we investigate Charged Domain Walls (CDW's), topological defects that acquire surface charge density $Q$ induced by fermion states localized on the walls. The presence of an electric and magnetic field on the walls is also discussed. We find a relation in which the value of the surface charge density $Q$ is connected with the existence of such topological defects.

  19. Die stand van wiskundeonderwys in Afrikaanse skole

    Directory of Open Access Journals (Sweden)

    Gerrit Stols

    2012-03-01

    Full Text Available Hoërordedenkvaardighede is noodsaaklike basiese vaardighede vir die een-en-twintigste eeu aangesien rekenaars berekeninge en algoritmes baie vinniger en akkurater kan doen as mense. Dit beteken dat skole leerders moet toerus om logies te dink, patrone te ontdek, bewyse te lewer, asook om nieroetineprobleme op te los. Hierdie fasette wat as hoërordedenke geklassifiseer word, is die kern van wiskundige denke en ontwikkeling. Suid-Afrika neem aan verskeie internasionaal vergelykende studies deel. Met behulp van hierdie vergelykende studies kan bepaal word hoe die Afrikaanse wiskundeleerders in Suid-Afrika se prestasie met dié van leerders in ander lande vergelyk en ook wat die tekortkominge in die wiskundeonderwys is. Volgens die 2003-TIMSS-uitslae is die probleem in Afrikaanse skole juis dié vrae wat hoërordedenke vereis. Dit beteken dat die Afrikaanse skole ’n doelbewuste poging sal moet aanwend om hoërordedenke te ontwikkel. Die 1999-TIMSS-videostudie toon dat die lande wat die beste presteer, soos Japan, tydens onderrig meer tyd wy aan die ontwikkeling van begripsvorming en aan die oplos van moeiliker probleme. Die fokus in die presterende lande is op die ontwikkeling van hoërordedenke deur probleemoplossing. Daar word dus minder tyd afgestaan aan herhaling van roetine- of soortgelyke oefeninge wat ’n rekenaar ook kan doen. Die omgekeerde hiervan is ’n tipiese verskynsel in Afrikaanse skole, waar ’n onderwyser byvoorbeeld een of meer voorbeelde op die bord doen waarna die leerders ’n hele aantal soortgelyke roetine-oefeninge doen.

  20. Electromagnetic approaches to wall characterization, wall mitigation, and antenna design for through-the-wall radar systems

    Science.gov (United States)

    Thajudeen, Christopher

    Through-the-wall imaging (TWI) is a topic of current interest due to its wide range of public safety, law enforcement, and defense applications. Among the various available technologies such as, acoustic, thermal, and optical imaging, which can be employed to sense and image targets of interest, electromagnetic (EM) imaging, in the microwave frequency bands, is the most widely utilized technology and has been at the forefront of research in recent years. The primary objectives for any Through-the-Wall Radar Imaging (TWRI) system are to obtain a layout of the building and/or inner rooms, detect if there are targets of interest including humans or weapons, determine if there are countermeasures being employed to further obscure the contents of a building or room of interest, and finally to classify the detected targets. Unlike conventional radar scenarios, the presence of walls, made of common construction materials such as brick, drywall, plywood, cinder block, and solid concrete, adversely affects the ability of any conventional imaging technique to properly image targets enclosed within building structures as the propagation through the wall can induce shadowing effects on targets of interest which may result in image degradation, errors in target localization, and even complete target masking. For many applications of TWR systems, the wall ringing signals are strong enough to mask the returns from targets not located a sufficient distance behind the wall, beyond the distance of the wall ringing, and thus without proper wall mitigation, target detection becomes extremely difficult. The results presented in this thesis focus on the development of wall parameter estimation, and intra-wall and wall-type characterization techniques for use in both the time and frequency domains as well as analysis of these techniques under various real world scenarios such as reduced system bandwidth scenarios, various wall backing scenarios, the case of inhomogeneous walls, presence