PUBLICATIONS
 

The following is a listing of the scientific papers and reports authored by Nico Laubscher. Co-authors’ names, where applicable, are placed in brackets.

BOOKS:

  1. with Joiner, B.L., Brown, E.S. & Levy, B., (1970), An Author and Permuted Title Index to Selected Statistical Journals, National Bureau of Standards Publication No. 321, Washington, DC, pp. (iv) + 506.

  2. Member of a specialist working committee, (1976), The Sampling of Coal and Preparation of a Sample for Analysis. S.A. Bureau of Standards, South African Code of Practice. Pretoria. pp. 1-68.

  3. Member of a specialist working committee, (1984), Statistiekwoordeboek / Statistical Dictionary, Terminology Service, Department of National Education, Pretoria., pp. 58 + 53.

PEER REVIEWED PUBLICATIONS:

  1. "Note on Fisher's Transformation of the Correlation Coefficient", Jour. Roy. Stat. Soc., B, Vol. 21, 1959, pp. 409-410.

  2. "On the Stabilization of the Poisson Variance". Trab.de Estadistica, Vol. 11, 1960, pp. 199-207.

  3. "Normalizing the Noncentral t and F Distributions", Ann. Math. Statist., Vol. 31, 1960, pp. 1105-1112.

  4. "On Stabilizing the Binomial and Negative Binomial Variances", Jour. Amer. Statist. Assoc., Vol. 56, 1961, pp. 143-150.

  5. "Statistical Inference for Quadratic Regression", (in Afrikaans), Tydskr. Natuurwet., Vol. 2, 1962, pp. 71-80.

  6. (with D.E.W. Schumann), "On the Comparison of Coefficients of Variation in the case of Two Independent Normal Samples", Jour. S.A. Inst. Mining Metall., Vol. 64, 1964, pp. 395-398.

  7. "Interpolation in F-tables", The American Statistician, Vol. 19, 1965, pp. 22-23.

  8. "A statistical evaluation of the effectiveness of medical sheepskins for the prevention of pressure sores", S.A. Medical Journal, Vol. 40, 1966, pp. 599-601.

  9. (with Steffens, F.E., en de Lange, E.M.): "Exact Critical Values for Mood's Distributionfree Test Statistic for Dispersion and its Normal Approximation", Technometrics, Vol. 10, 1968, pp. 497-507.

  10. "Single and Multiple Discrimination Regions in Multiple Regression", South African Statist. Jour., Vol. 2, 1968, pp. 67-75.

  11. "Some Statistical Methods and their Application to the Design and Analysis of Experiments in the Biosciences", S.A. Med. Jour., Vol. 48, 1974, pp. 2525-2527.

  12. (with Odeh, Robert E.): "The Exact Distribution of Sukhatme's Statistic for Dis-persion in Two Populations", Communications in Statistics, Vol. A5, 1976, pp. 1393-1407.

  13. "Likelihood Analysis of Line Transect Samples", Proceedings of the 44th Session of the International Statistical Institute, Vol. I, 1983, pp. 22-25.

  14. "The Indicator Function: A Useful Device for Determining Certain Minimal Sufficient Statistics", Statistica Neerlandica, Vol. 39, 1985, pp. 303-307.

  15. "An analytic approximation to the distribution of Lilliefors's test statistic for normality". The American Statistician, 1987, 40, pp. 294-296.

  16. (with Kidd, Martin): "Robust Estimation of Scale based on Hampel's Lemma Five with Application to the Rayleigh Family", South African Statist. Jour., Vol. 27, 1993, pp. 203 - 220.

  17. "Comments on the use of spectral control charts", Technometrics, 1994, Vol. 36, pp. 335 - 336.

  18. "Comments on 'How to approximate a histogram by a normal density' ", The American Statistician, Vol. 47, 1994, pp. 251-252.

  19. (with Kidd, Martin): "Robust confidence intervals for scale and its application to the Rayleigh distribution", South African Statist. Jour., Vol. 29, 1995, pp. 199 - 217.

  20. "A variance components model for statistical process control", South African Statist. Jour., Vol. 30, 1996, pp. 27 - 47.

APPLIED RESEARCH:

  1. (with Prinsloo, J.G., et al.), "Electrolyte changes during the first six days of hospitalisation of bantu male infants with gastro-enteritis", S.A. Med. Jour., Vol. 44, 1970, pp. 494-496.

  2.  (with Prinsloo, J.G., et al.), "Composition of breast milk of bantu and white women on the fifth postpartum day", S.A. Med. Jour., Vol. 44, 1970, pp. 738-739.

  3. (with Wasserman, H.P. & Botha, M.A.), "Valuation of an improved method for direct basophil counts", S.A. Med. Jour., Vol. 45, 1971, pp. 491-492.

  4. (with Du Plessis, J.P., et al.), "The clinical and biochemical effects of riboflavin and nicotine amide supplementation upon Bantu school children using maize meal as carrier medium", S.A. Med. Jour., Vol. 45, 1971, pp. 530-537.

  5. (with Prinsloo, J.G., et al.), "Comparison of oral glucose- tolerance tests and serum insulin responses in pellagra and kwashiorkor", S.A. Med. Jour., Vol. 45, 1971, pp. 554-555.

  6. (with Steffens, F.E.& Vrba, E.S.), "Statistical evaluation of the status of a fossil member of the bovidae (Mammalia: Artiodactyla)", Annals of the Transvaal Museum, Vol. 28, 1972, pp. 17-26.

  7. (with Louw, M.E.J. & Du Plessis, J.P.), "A biochemical evaluation of the nutrition status of rural and urban pedi males", S.A. Med. Jour., Vol. 46, 1972, pp. 1139-1142.

  8. (with Luck, H. & Andrew, M.J.A.), "Sample size determination for estimating the mean butterfat content of milk", Milchwissenschaft, Vol. 27, 1972, pp. 286-290.

  9. (with Wasserman, H.P. & Muller, M.A.K.), "Ethnic and sex differences in an interracial study of direct basophil counts", S.A. Med. Jour., Vol. 46, 1972, pp. 143-145.

  10. (with Van der Watt, J.P., et al.), "Aortic intimal lesions and serum lipids in wild baboons", Jour. Med. Prim., Vol. 2, 1973, pp. 25-38.

  11. (with De Klerk, W.A., et al.), "Vitamin C requirements of the vervet monkey under experimental conditions", S.A. Med. Jour., Vol. 47, 1973, pp. 705-708.

  12. (with Prinsloo, J.G., et al.), "The effect of different sugars and two levels of fat intake on diarrhea in Bantu children", S.A. Med. Jour., Vol. 47, 1973, pp. 821-828.

  13. (with Du Plessis, J.P. & Joubert,C.P.), "The incidence and classification of metabolic abnormalities occurring in a group of male members of the S.A. Air Force", S.A. Med. Jour., Vol. 47, 1973, pp. 1491-1495.

  14. (with Versluis, E.E., Groothof, G. & Du Plessis, J.P.), "Results of a dietary survey of white men between the ages of eighteen and retirement", S.A. Med. Jour., Vol. 47, 1973, pp. 1495-1497.

  15. (with Du Plessis, J.P., Wittman et al.), "The effect of the enrichment of maize meal with nicotinic acid and riboflavin on the vitamin and protein nutritional status of young school-going and preschool children", S.A. Med. Jour., Vol. 48, 1974, pp. 1641-1649.

  16. (with Visagie, M.E., Du Plessis, J.P., Groothof, G. & Alberts, A.) , "Changes in vitamin A and C levels in black mine workers", S.A. Med. Jour., Vol. 48, 1974, pp. 2502-2506.

  17. (with Kotze, J.P., et al), "Seasonal variation in ascorbic acid and serum lipid composition of free-living baboons (Papio ursinus)", S.A. Med. Jour., Vol. 48, 1974, pp. 1700-1702.

  18. (met Du Plessis, J.P. et al.), "Integrity of the hypothalmo-pituitary-adrenal axis in kwashiorkor as tested with piromen", S.A. Med. Jour., Vol. 48, 1974, pp. 2303-2305.

  19. (with Gerhardt, C. et al.), "Obesity: a psychological study". S.A. Med. Jour., Vol. 48, 1974, pp. 2507-2508.

  20. (with Prinsloo, J.G. et al.), "A comparison between oral pivampicillin and ampi¬cillin in children with bronchopneumonia", S.A.
    Med. Jour.    , Vol. 48, 1974, pp. 2627-2628.

  21. (with Purry, N.A.), "The incidence of perthes' disease in three population groups in the Eastern Cape region of South Africa", Journal of Bone and Joint Surgery, Vol. 64 B, 1982, pp. 286-288.

TECHNICAL REPORTS:

  1. Moderne rekenmasjiene (Modern computers), Die Besembos, Potchefstroom University, 1955 [My first publication ever, material mostly taken from Popular Science and Popular Mechanics!].

  2. (with Rudolph, G.J.), A distribution arising from random points on the circumference of a circle, CSIR Research Report No. 268, 1968, pp. 1-15.

  3. Sample-size Determination when both sample fluctuation and experimental error are present, CSIR Research Report No. 275, 1968, pp. 1-15.

  4. (Editor), Proceedings of a symposium on mathematical statistics, CSIR Special Report: WISK 60, April 14-17, 1969, pp. 67.

  5. (Editor), Proceedings of second symposium on mathematical statistics, CSIR Special Report: WISK 69, April 16-17, 1970, pp. 45.

  6. (Editor), Proceedings of a third symposium on mathematical statistics, CSIR Special Report WISK 89, May 18-19, 1971, pp. 118.

  7. A short course on nonparametric statistical theory, (Ten lectures by invitation of and delivered at the University of Cape Town), CSIR Special Report: WISK 100, 1972, pp. 60.

  8. Confidence Intervals for the ratio of scale parameters: two-sample case, Technical Report No. 98, Department of Statistics, Stanford University, 1975, pp. 11.

  9. (with Maule, A.A.), Statistical models encountered in some aspects of the sampling of coal, Department of Statistics Technical Report No. 7801, University of Port Elizabeth, 1978, pp. 53.

  10. Statistical Analysis for Repeatability and Reproducibility of the ROGA Index of South African Coal, Department of Statistics Technical Report No. 7901, University of Port Elizabeth, 1979, pp. 14.

  11. (with Koorts, A. S.), Efron's Statistical Curvature - an Exciting Idea in Statistical Inference, Department of Statistics Technical Report No. 7904, University of Port Elizabeth, 1979, pp. 12.

  12. (with Weisser, P.J. and Mooney, H.), Contribution to the autecology of Copiapoa solaris (F. Ritter) F.Ritter, Cactacaea: some morphometric, population and biomass parameters", Department of Statistics Technical Report No. 8501, University of Port Elizabeth, 1985.

  13. Statistical analysis of sodium and alkaline phosphatase data, Department of Statistics Technical Report No. 8503, University of Port Elizabeth, (prepared for Maybaker (Pty) Ltd), 1985.

  14. (with Rossouw, I.), Point and interval estimation of the rayleigh parameter for censored data, Department of Statistics Technical Report, University of Port Elizabeth, 1986.

  15. Sample size for determining the proportion of blocked irrigation droppers as well as the degree of blockage, with prescribed accuracy, Department of Statistics Technical Report, University of Stellenbosch, 1987.

  16. Statistical models when predicting the vintage (In Afrikaans), Department of Statistics Technical Report, University of Stellenbosch, 1987.

  17. Constructing a Control Chart for the Coefficient of Variation, SANS Technical Report: 1990.

  18. Design of experiments: A fundamental tool towards Quality and productivity, SANS Technical Report: 1990.

  19. The two-sample Poisson sample size problem, SANS Technical Report: 1990.

  20. On Estimating and Testing the Poisson Parameter, SANS Technical Report: BW/92/0028, 1992.

  21. Sample Size for Detecting Significant Differences in Mean CEG Level, SANS Technical Report, 1993.

  22. Precision of the Means in Two Related Random Effects Analysis of Variance Models, SANS Technical Report: BW/94/0001, 1994.

  23. Reviewing product control parameter specifications for a pair of (X-bar; R) charts, SANS Technical Report: BW/95/00022, 1995.

  24. (With Kidd, M.), A review of decision tree methodology to determine the structure of large data sets, Institute of Maritime Technology Technical Report: Simon's Town, 1998.

  25. (With Kidd, M.), Bayesian Belief Networks and its application, Institute of Maritime Technology Technical Report: Simon's Town, 1999.

  26. (With Kidd, M.), Methodology and Application of Multivariate Adaptive Regression Splines (MARS), Institute of Maritime Technology Technical Report: Simon's Town, 2000.

  27. Neural Networks for Pattern Recognition, Presentation for De Beers Group: Cape Town, 2001.

  28. (With Kidd, M.), Association analysis and Genetic Algorithms: An introduction to two rule based induction methods, Institute of Maritime Technology Technical Report: Simon's Town, 2002.

  29. (Rule Induction by Association Analysis in Data Mining), Conference in honour of professor Francois E. Steffens, University of South Africa, Pretoria. (2002, pp. 85 - 98).

  30. (With Kidd, M.), One-day workshop in Data-mining, South African Statistical Association: Annual Conference, Rhodes University: Grahamstown, 2005.

  31. Designed experiments for improving productivity. Invited presentation: Department of Physics, University of the Western Cape, 2006.

  32. Text mining. Presentation in the Seminar Series, Statistics Department, University of Stellenbosch, 2008.

  33. Training in the advanced use of STATISTICA Data Miner, Department of Process Engineering: University of Stellenbosch, 2008.

  34. Aspects of industrial statistics. Invited presentation to the Stellenbosch Statistical Symposium (arranged by International Society for Business and Industrial Statistics), 2009.