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Search Results: 1 - 10 of 437649 matches for " P.J. Conradie "
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A NEW PROCESS IMPROVEMENT APPROACH FOR MANAGEMENT CONSULTANCY ORGANISATIONS
M. De Vries,P.J. Conradie
South African Journal of Industrial Engineering , 2012,
Abstract: ENGLISH ABSTRACT: Management consultancy organisations of the 21st century realise that they need to move away from balance sheet accounting systems as the primary tool of management. Intangible assets, such as knowledge, skills and process assets, may be worth more than their physical assets, and require effective management to gain a competitive advantage. Many models for process-improvement and knowledge management that currently exist could be used in leveraging organisational intangible assets. Though the intricate interaction between the domains of process improvement management and knowledge management is clear in current models, a fully integrated model does not exist. The aim of this article is to demonstrate the integration possibilities of process improvement and knowledge management in an attempt to improve the practices of both during the same exercise, using an integrated model. AFRIKAANSE OPSOMMING: Bestuurskonsultasie-organisasies van die 21ste eeu besef dat hul moet wegbeweeg van balansstaat gebaseerde rekenkundige stelsels as die primêre gereedskapstuk vir bestuur. Ontasbare bates, soos kennis, vaardighede en prosesbates, mag meer waardevol wees as fisiese bates, en moet effektief bestuur word om ‘n mededingende voordeel te behou. Talle modelle vir prosesverbeteringsbestuur en kennisbestuur bestaan tans en word ingespan om optimale benutting van die ontasbare bates te verseker. Alhoewel die ingewikkelde interaksie tussen die velde van prosesverbeteringsbestuur en kennisbestuur duidelik is in die bestaande modelle, bestaan daar nie ‘n ge ntegreerde model nie. Hierdie artikel demonstreer die integrasie moontlikhede van prosesverbeteringsbestuur en kennisbestuur deur gebruik te maak van ‘n ge ntegreerde model, sodat praktyke van beide velde gedurende dieselfde oefening verbeter word.
A MODEL TO OPTIMIZE PAYLOADS AT PFG BUILDING GLASS
R. Brits,P.J. Conradie
South African Journal of Industrial Engineering , 2012,
Abstract: ENGLISH ABSTRACT: While improving customer service by allowing user definable mixed load orders of their plate glass product, PFG Building Glass was confronted with a problem of calculating the feasibility and optimum load layout for transporting the glass, without transgressing the regulatory requirements. In this article the development of an integrated solution is discussed, including the definition of a mathematical model that calculates the axle weights, the optimization model based on linear programming, as well as the user interface for their current information system. The solution enables the company to proceed with e-commerce service to clients, since the system can evaluate the transport feasibility and give real time feedback to clients. AFRIKAANSE OPSOMMING: Die uitbreiding van kli ntediens by PFG Building Glass om bestellings van gemengde glasplaatprodukte per vrag te aanvaar, het die onderneming voor ‘n uitdaging geplaas om te bereken of sulke bestellings binne die wetlike regulasie vervoer sal kan word. Hierdie artikel bespreek die ontwikkeling van ‘n ge ntegreede oplossing wat bestaan uit ‘n wiskundige model wat die gewig per as bereken, ‘n optimiseringsmodel wat die vraguitleg bepaal en op liniêre programmeringsbeginsels gebaseer is, sowel as die gebruikersintervlak met die onderneming se bestaande inligtingstelsel.Hierdie ontwikkeling stel die onderneming instaat om ‘n e-besigheidsdiens vir kliente daar te stel, aangesien terugvoer oor die uitvoerbaarheid van ‘n bestelling uit ‘n vervoeroogpunt intyds aan die kli nt gekommunikeer kan word.
THE NECESSITY OF INFORMATION QUALITY FOR EFFECTIVE BUSINESS INTELLIGENCE
P.J. Conradie,P.S. Kruger
South African Journal of Industrial Engineering , 2012,
Abstract: ENGLISH ABSTRACT: Data quality, or rather the lack thereof, has been the downfall of many Data warehousing (DW) / Business Intelligence (BI) projects. The concept of Information Quality (IQ) has become increasingly important as the popularity of Business Intelligence (BI) increases. Industrial engineers have played a key role in the development and implementation of Total Quality Management (TQM) principles that are widely used in the manufacturing environment. In the information era, industrial engineers can apply the same principles to data. This article aims to identify strategies and processes to improve IQ that will eventually lead to data warehouses with complete, accurate and timely data that consistently meets the requirements of knowledge workers in their quest to make improved business decisions. AFRIKAANSE OPSOMMING: Die gebrek aan datakwaliteit het al menige Databergings- en Besigheidsintelligensieprojekte laat sneuwel. Die konsep van Inligtingskwaliteit word al meer prominent soos die gewildheid van Besigheidsintelligensie toeneem. Bedryfsingenieurs het reeds ‘n sleutelrol gespeel in die ontwikkeling en implementering van Totale Kwaliteitsbestuurbeginsels wat algemeen in die vervaardigingsomgewing gebruik word. In die inligtingsera kan bedryfsingenieurs dieselfde beginsels ook op data toepas. Hierdie artikel identifiseer strategie en prosesse om inligtingskwaliteit te verbeter wat uiteindelik behoort te lei tot datastore met volledige en akkurate data wat betyds en konsekwent aan kenniswerkers se behoeftes voldoen en hulle instaat stel om beter besigheidsbesluite te neem.
USING A NEW SUPPLY CHAIN PLANNING METHODOLOGY TO IMPROVE SUPPLY CHAIN EFFICIENCY
A.L.V. Raubenheimer,P.J. Conradie
South African Journal of Industrial Engineering , 2012,
Abstract: ENGLISH ABSTRACT: Effective supply chain planning and management has emerged as one of the most challenging opportunities for companies in the global economy during the last decade or two. This article reviews the evolution of Supply Chain Management and the traditional Supply Chain Solutions. It then introduces a new Supply Chain Planning methodology in which simulation modelling plays an important value-adding role to help organisations understand the dynamics of their Supply Chains. AFRIKAANSE OPSOMMING:Effektiewe voorsieningskettingbeplanning en –bestuur het gedurende die laaste twee dekades ontwikkel tot een van die mees uitdagende geleenthede vir ondernemings in die wêreldekonomie. Hierdie artikel hersien kortliks die ontwikkeling van voorsieningskettingbestuur en die tradisionele oplossings. ‘n Nuwe voorsieningskettingbeplanningsmetodologie word dan voorgestel en bespreek waarin simulasiemodellering ‘n belangrike rol speel om ondernemings te help om die dinamika van hul voorsieningskettings te begryp.
IMPLEMENTATION DRIVERS FOR BPR AT SIEMENS TELECOMMUNICATIONS
C.C. Koorts,P.J. Conradie
South African Journal of Industrial Engineering , 2012,
Abstract: ENGLISH ABSTRACT: With the embracing of neV'( management philosophies or redesigned processes, it is becoming a popular opinion that often the practical problem lies with the implementation of the new concept, rather than with the concept itself. By focussing on certain generic critical actions, chances of successful implementation increases for any new philosophy or re-engineered process. This article discusses such critical success actions, or implementation drivers as experience in a BPR project at Siemens Telecommunications. AFRIKAANSE OPSOMMING: 'n Gewilde siening ten opsigte van die bekendstelling van nuwe bestuursfilosofiee, of implementering van herontwerpde prosesse, is dat die probleem gewoonlik Ie by die implementering daarvan, eerder as by die beginsels van die bestuursfilosofie wat geimplementeer word . Deur op generies kritieke faktore te konsentreer, kan die kanse op suksesvolle implementering van bykans enige bestuursfilosofie of herontwerpde proses verbeter word. Hierdie artikel bespreek sulke kritieke sukses aksies, of implementeringsdrywers, aan die hand van 'n gevallestudie soos ervaar in 'n BPR projek by Siemens Telecommunications.
OVERVIEW OF WORK PIECE TEMPERATURE MEASUREMENT TECHNIQUES FOR MACHINING OF Ti6Al4V#
P.J.T. Conradie,G.A. Oosthuizen,N.F. Treurnicht,A. Al Shaalane
South African Journal of Industrial Engineering , 2012,
Abstract: ENGLISH ABSTRACT: Ti6Al4V is one of the most widely used titanium alloys in aerospace applications, but its machining remains a challenge. Comprehensive research has been done in the past, mainly investigating tool failure of various materials. Less research has been done to investigate the thermal effect of machining on work piece quality, including fatigue performance. Temperature measurement is considered to be a key enabling technology. This study presents an overview of current temperature measurement techniques for machined and tool surfaces. Two categories of methods were investigated: slower contact, and faster optical methods. Optical fibre two colour pyrometry experiments are reported that demonstrate the technique’s adequate response time. The infrared camera temperature measurement experiments synchronised temperature measurement with visual observation, aimed at mechanism analysis. The results corresponded with the literature. AFRIKAANSE OPSOMMING: Ti6Al4V is een van die mees gewilde lugvaart allooie, maar sy masjinering is ’n uitdaging. Bestaande navorsing dek beitelslytasie omvattend. Die termiese effek van masjinering op werkstuk integriteit, insluitend vermoeiingleeftyd, het egter veel minder dekking geniet. Temperatuurmeting wat in hierdie studie ondersoek word, word as ’n sleuteltegnologie beskou. Twee kategori metodes is ondersoek, nl stadige kontakmetodes en optiese metodes met vinnige respons, wat die meting van oorgangsverskynsels moontlik maak. Eksperimentele werk wat beide optiese vesel tweekleurpirometrie en termiese kamera tegnieke insluit bewys die tegnieke as geskik vir die benodigde navorsing.
Mechanisms of Ectopic Gene Conversion
P.J. Hastings
Genes , 2010, DOI: 10.3390/genes1030427
Abstract: Gene conversion (conversion), the unidirectional transfer of DNA sequence information, occurs as a byproduct of recombinational repair of broken or damaged DNA molecules. Whereas excision repair processes replace damaged DNA by copying the complementary sequence from the undamaged strand of duplex DNA, recombinational mechanisms copy similar sequence, usually in another molecule, to replace the damaged sequence. In mitotic cells the other molecule is usually a sister chromatid, and the repair does not lead to genetic change. Less often a homologous chromosome or homologous sequence in an ectopic position is used. Conversion results from repair in two ways. First, if there was a double-strand gap at the site of a break, homologous sequence will be used as the template for synthesis to fill the gap, thus transferring sequence information in both strands. Second, recombinational repair uses complementary base pairing, and the heteroduplex molecule so formed is a source of conversion, both as heteroduplex and when donor (undamaged template) information is retained after correction of mismatched bases in heteroduplex. There are mechanisms that favour the use of sister molecules that must fail before ectopic homology can be used. Meiotic recombination events lead to the formation of crossovers required in meiosis for orderly segregation of pairs of homologous chromosomes. These events result from recombinational repair of programmed double-strand breaks, but in contrast with mitotic recombination, meiotic recombinational events occur predominantly between homologous chromosomes, so that transfer of sequence differences by conversion is very frequent. Transient recombination events that do not form crossovers form both between homologous chromosomes and between regions of ectopic homology, and leave their mark in the occurrence of frequent non-crossover conversion, including ectopic conversion.
Infrared coagulation versus rubber band ligation in early stage hemorrhoids
Gupta, P.J.;
Brazilian Journal of Medical and Biological Research , 2003, DOI: 10.1590/S0100-879X2003001000022
Abstract: the ideal therapy for early stages of hemorrhoids is always debated. some are more effective but are more painful, others are less painful but their efficacy is also lower. thus, comfort or efficacy is a major concern. in the present randomized study, a comparison is made between infrared coagulation and rubber band ligation in terms of effectiveness and discomfort. one hundred patients with second degree bleeding piles were randomized prospectively to either rubber band ligation (n = 54) or infrared coagulation (n = 46). parameters measured included postoperative discomfort and pain, time to return to work, relief in incidence of bleeding, and recurrence rate. the mean age was 38 years (range 19-68 years). the mean duration of disease was 17.5 months (range 12 to 34 months). the number of male patients was double that of females. postoperative pain during the first week was more intense in the band ligation group (2-5 vs 0-3 on a visual analogue scale). post-defecation pain was more intense with band ligation and so was rectal tenesmus (p = 0.0059). the patients in the infrared coagulation group resumed their duties earlier (2 vs 4 days, p = 0.03), but also had a higher recurrence or failure rate (p = 0.03). thus, we conclude that band ligation, although more effective in controlling symptoms and obliterating hemorrhoids, is associated with more pain and discomfort to the patient. as infrared coagulation can be conveniently repeated in case of recurrence, it could be considered to be a suitable alternative office procedure for the treatment of early stage hemorrhoids.
Análise comparativa do crescimento de biótipos de pic?o-preto (Bidens pilosa) resistente e suscetível aos herbicidas inibidores da ALS
Christoffoleti, P.J.;
Planta Daninha , 2001, DOI: 10.1590/S0100-83582001000100009
Abstract: the resistance of weed biotypes to acetolactate synthase (als) inhibitor herbicides is due to this enzyme's lack of sensitivity to als inhibitor herbicides, which inhibit its catalytic activity. als insensitivity results from a structural change in the aminoacid sequence, exactly in the site of action of these herbicides. eventually this modification in the enzyme may result in a reduced plant growth rate. such reduction was also observed in biotypes resistant to photosystem ii inhibitor herbicides. the possibility of a lower growth rate of the resistant plant may directly affect biotype competitiveness, its population dynamics and, as a consequence, resistance management strategies. the objective of this research was to compare the growth rates of both resistant and susceptible bidens pilosa biotypes to als inhibitor herbicides. the experiment was conducted in a greenhouse, using one plant per pot of 5 l capacity. four plants per biotype were harvested weekly, starting 14 days after planting, and the leaf area and dry biomass were measured. the richards function fitted to the data enabled the derivation of absolute growth rate, relative growth rate and net assimilation rate. the susceptible biotype had a higher biomass accumulation during the early stages, with both biotypes having the same size, afterwards. the higher net assimilation rate of the resistant biotype during the early stages of growth was balanced by its lower size during the first four weeks of growth. it was concluded that both biotypes have the same size, being very likely that resistant and susceptible bidens pilosa have the same competitiveness.
Partikuliere en Algemene Sinodes: 'n gereformeerde benadering/Particular and general synods
P.J Strauss
Acta Theologica , 2004,
Abstract: In this article the author investigates the character, composition and task of particular or regional synods and of general synods in reformed churches. Although the character and composition of these assemblies in the church can be defined fairly easily, the same can not be said of the distinction between the task of the former and the latter. The fact that both of them were called upon in the past to look after matters common to all congregations within its borders, created a vagueness in this regard. Which are those matters common to all congregations which should be attended to by particular synods and which by general synods? His solution is the application of two well-known principles of a reformed church polity: firstly, that major assemblies should not attend to matters which could be dealt with at minor assemblies, and, secondly, that a general synod should concentrate on those issues which are really common to all congregations in the specific denomination.
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