THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

https://www.scielo.br/pdf/bjm/v47n1/1517-8382-bjm-47-01-0110.pdf

Enzymatic saccharification and fermentation of cellulosic date palm wastes to glucose and lactic acid

Acoustic and thermal properties of a cellulose nonwoven natural fabric (barkcloth)

Thermo-mechanical and morphological characterization of needle punched non-woven banana fiber reinforced polymer composites

Acoustic properties of textile materials have been studied for several decades. But, mostly used materials were synthetic, and hence, they were not eco-friendly in nature. Therefore, an attempt was put forward to try the sound absorption property of natural fibres and their blends by needle-punched nonwoven techniques. Nonwoven fabrics of ideal materials are used as acoustical insulation products because they have high total surface area. The effect of blend proportion of kapok and milkweed fibres with cotton, fabric GSM, bulk density and distance of fabric from sound source on sound reduction of nonwoven fabrics was investigated. The sound reduction increases with increase in blend proportion of kapok and milkweed fibres. A nonwoven fabric of cotton/milkweed 40/60 shows the highest sound reduction potential. As the distance between the fabric and sound sources increases, the sound reduction also increases linearly due to reduction of sound intensity which reduces the transmission of sound through the fab...

Development of acoustic nonwoven materials from kapok and milkweed fibres

Effect of area density, fabric type, source intensity, number of layers, distance of fabric from sound source, distance of fabric from the receiver and fibre type on sound reduction of various needle-punched nonwoven fabrics has been studied in an indigenously fabricated equipment. Nonwoven fabric shows higher sound reduction than the woven fabric. Jutepolypropylene (1:1) blend shows maximum sound reduction among jute, polypropylene, polyester and other jutepolypropylene blend (3:1 and 1:3) samples. Higher area density is responsible for higher sound reduction and there is a negative correlation between area density or bulk density of needle-punched nonwoven and sound reduction. With the increase in number of layers of nonwoven fabric, the sound reduction through the fabric increases initially but after the maximum it remains almost unaltered. Sound reduction also increases as the distance between the fabric and the sound source increases, and the source decibel decreases.

/pdf/sound-reduction-by-needle-punched-nonwoven-fabrics-18s50alcuu.pdf

Sound reduction by needle-punched nonwoven fabrics

Development of a low cost yarn parameterisation unit by image processing

Development of sunnhemp (Crotalaria juncea) fibre based unconventional fabric

Fabric bending behaviour testing instrument for technical textiles

Cross-laid needle-punched nonwoven fabrics were prepared from 100% jute and blends of jute and polypropylene having jute as a major constituent. The effects of blend composition, punch density, depth of needle penetration, staple length of jute fibre, fineness of polypropylene fibre and fibre laying technique on bulk density, tensile properties and bending properties of the fabrics in the machine direction were studied. Blending of polypropylene with jute made the nonwoven fabrics bulkier, stronger, tougher and more flexible. With the increase in punch density and depth of needle penetration, the mechanical properties improved initially and after attaining the optimum value they deteriorated. Jute fibre cut length of 80 mm showed the optimull1 mechanical properties of fabric. Fabrics prepared using finer polypropylene fibre and random-laid webs exhibited better tensile and bending properties in the machine direction compared to those made out of coarser fibre and cross-laid webs.

http://nopr.niscair.res.in/bitstream/123456789/23475/1/IJFTR%2024%281%29%2034-40.pdf

Surajit Sengupta

Papers

Sound reduction by needle-punched nonwoven fabrics

Development of a low cost yarn parameterisation unit by image processing

Development of sunnhemp (Crotalaria juncea) fibre based unconventional fabric

Fabric bending behaviour testing instrument for technical textiles

Mechanical behaviour of jute and polypropylene blended needle-punched fabrics