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Sunday, April 26, 2020 | History

1 edition of Sampling and measuring methods for determining fineness and uniformity in wool found in the catalog.

Sampling and measuring methods for determining fineness and uniformity in wool

E. M. Pohle

Sampling and measuring methods for determining fineness and uniformity in wool

  • 324 Want to read
  • 34 Currently reading

Published by U.S. Dept. of Agriculture in Washington, D.C .
Written in English

    Subjects:
  • Wool,
  • Testing,
  • Textile fibers

  • Edition Notes

    Statementby Elroy M. Pohle, L.N. Hazel and H.R. Keller
    SeriesCircular / United States Department of Agriculture -- no. 704, Circular (United States. Dept. of Agriculture) -- no. 704.
    ContributionsHazel, L. N. (Lanoy Nelson), 1911-, Keller, Henry R.
    The Physical Object
    Pagination14 p. :
    Number of Pages14
    ID Numbers
    Open LibraryOL25516367M
    OCLC/WorldCa17202960

    Photoelectricity Fiber Length Tester, to measure the length of cotton fiber by photoelectricity technology, is mainly used in cotton inspection and purchasing for cotton spinning factories. Photoelectricity fiber is the optical transmission tool using the principle of total reflection. Objective measurement of wool. criteria, methods and materials. An outline of some of the techni­ cal aspects of the objective measurement of wool—processes that will mean major cost savings to the wool industry. by A. Ingleton, Instructor, Sheep and Wool Branch. Objective testing is the scientific measurement of the important. the sampling must be true and representative of the bulk lot. The sampling procedure should be designed to take account of and to minimise the known sources of variability such as the variation between spindles, the variation along the length of the bobbin, etc. The procedure for sampling and the number.


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Sampling and measuring methods for determining fineness and uniformity in wool by E. M. Pohle Download PDF EPUB FB2

Add tags for "Sampling and measuring methods for determining fineness and uniformity in wool". Be the first. Sampling fleeces for determining average wool fineness / (Washington, D.C.: U.S. Dept. of Agriculture, ), by J.

Hardy and H. Wolf (page images at HathiTrust) Beef, mutton and wool. A practical handbook for meat and wool production for the Australian farmer.

D Test Method for Wool Content of Raw Wool--Laboratory Scale. D Test Methods for Quantitative Analysis of Textiles. D Practice for Core Sampling of Raw Wool in Packages for Determination of Percentage of Clean Wool Fiber Present. D Practice for Conditioning and Testing Textiles.

D Specification for Fineness of Types of Alpaca. Statistical Techniques for Sampling and Monitoring Natural Resources There are several good introductory books available on sampling. The book by Johnson () is very basic and gives extensive information. It is dated, however, in that it does not cover more sampling methods work, the classical books Sarndal and others () and Cited by: Sampling and measuring methods for determining fineness and uniformity in wool.

Elroy M. Pohle, L. Hazel and II. Keller, Bureau of Animal Industry. 14 p., illus. (Circular C.) Price Comparison of native grasses and crested wheatgrass and of supplements for beef cattle in the northern Great Plains.

Black and V. Clark. If the wool is so loosely packed that a core cannot be cut, or if it is so highly compressed that the sampling tool cannot readily penetrate into the package to the required depth and in the required direction, core sampling is not applicable.

The density of wool in most types of commercial packages is suitable for sampling by this method. The selection of sampling methods and determination of sample size are extremely important in applied statistics research problems to draw correct conclusions.

If the sample size is too small, even a well conducted study may fail to detect important effects. the sampling procedure. methods of inferential statistics assume random sampling, that is, that there is an equal probability of choosing every item in the sampled population and every possible sample; these conditions are satisfied only by independent random sampling (i.e.

with replacement of measured items), although sampling without. Measurement uncertainty arising from sampling: A guide to methods and approaches Second edition () Contents. This Guide aims to describe various methods that can be used to estimate the uncertainties arising from the processes of sampling and the physical preparation of samples.

History of Sampling (Contd) Dates back to and started by Literary Digest, a news magazine published in the U.S. between and Digest successfully predicted the presidential elections in, but; Failed in The Literary Digest poll in used a sample of 10 million, drawn from government lists of automobile and telephoneFile Size: KB.

Probability sampling methods tend to be more time-consuming and expensive than non-probability sampling. In non-probability (non-random) sampling, you do not start with a complete sampling frame, so some individuals have Sampling and measuring methods for determining fineness and uniformity in wool book chance of being selected.

The details of the procedures employed for proper sampling and the methods adopted for determining the various physical quality factors of cotton fibres are described in the following sections. Sampling Techniques For The Determination of Fiber Properties The sampling method used to select a fiber for testing depends upon the form in which the.

There are several techniques for sampling fiber. Here is given the most popular sampling method. Zoning Sampling Technique: Zoning is a popular testing method of fiber that is used for selecting samples from raw cotton or wool or other loose fibre where the properties may vary considerably from place to place.

A handful of fibres is taken at. tive sample of wool will differ according to circumstances. The sampling procedures and major circumstances encountered are as follows: Lots of Packaged, Grease, Pulled, or Scoured Wool— Take core samples as directed in Practice D Clean or scour the raw wool sample as directed in Test Method D File Size: KB.

section on sampling in test methods. NOTE 2—An extensive discussion of grease wool staple sampling can be found in the literature.5 6.

Apparatus Sampling Tool—A spear-shaped tool with a hook or barb at one end for use in extracting a small quantity of wool from within a bag (Fig. This tool is not available Size: 44KB. -describe methods for determining population size -explain causes of changes in population size -identify factors that limit population growth.

sampling, and mark-and-recapture studies. Environmental Science Studying Populations 12 Terms. mimiesu. Studying Populations 14 Terms. Siskscience. studying populations 19 Terms. AWTA Wool Testing provides independent and objective wool certification services.

AWTA Wool Testing's major services are sampling, testing and certifying the yield, fibre diameter, vegetable matter content, staple length and staple strength of greasy wool before it is sold. Some methods of determining the size of population are direct and indirect observations, sampling, and mark-and-recapture studies.

Sampling - Done by counting the animals in a small area and then estimating how many are in the larger area. You go out and take samples from different places so you can take the average. Wools produced from five widely differing breeds of sheep which were raised under the same environmental and dietary conditions have been studied.

Pohle, E.M., Hazel, L.N., and Keller, H.R., "Sampling and Measuring Methods for Determining Fineness and Uniformity in Wool," Circular H. (editors), "American Wool Handbook," 2 nd ed Cited by: Fiber fineness: The fiber fineness is expressed in weight per unit length or length per weight.

According to “Textile Institute”, the fineness of cotton, silk and manufactured fibers is usually expressed in terms of average linear density. Fiber fineness can be measured by the following method: Air flow method, Gravimetric method.

planimetric methods are always applicable for determining average grain size. However, the comparison charts cannot be used for measurement of individual grains.

Scope These test methods cover the measurement of average grain size and include the comparison procedure, the planimet-ric (or Jeffries) procedure, and the intercept procedures File Size: KB. Sample preparation method and Laboratory sampling procedures involve either: Coning and Quartering; or Riffling Method.

Coning and Quartering for sample preparation techniques/method The method which is used for sampling large quantities of material say 20kg, consists of pouring or forming the material into a conical heap upon a solid surface (e.g. a steel plate) and relying on radial symmetry. Techniques and Practice of Ecological Sampling.

One of the first things a field ecologist will want to know about an animal or plant species is: How dense is the population [units of density are number of individuals {or colonies etc.} per unit area {or volume}].

Another important question is: How are the organisms dispersed [The pattern of distribution in space] within the habitat. Application • Automatic Wool Fineness Tester, using Airflow method to test the Wool Fineness with the widest measurement range from 12 ~ 50um, test results are directly displayed on the LCD screen, and can also be connected with the computer via USB port, with LAB test software offered, to analysis and print out the perfect test report.

Methods for measuring fibre fineness. A series of 14 papers by Sommerville (–) reviewing methods of measuring fibre fineness are essential reading for those interested in this topic.

Cross-sections. Microscopy offers the only direct method for measuring the absolute characteristics of fibre by: 1. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Applied statistics research plays pivotal role in diverse problems of social sciences, agricultural sciences, health sciences, and business research.

Many investigations are conducted by survey research. The technique of sampling and determination of sample size have crucial role in survey-based research problems in. In statistics, quality assurance, and survey methodology, sampling is the selection of a subset (a statistical sample) of individuals from within a statistical population to estimate characteristics of the whole population.

Statisticians attempt for the samples to represent the population in question. Two advantages of sampling are lower cost and faster data collection than measuring the. NOTE 1-For other methods for determining the fineness of fibers based on the air-flow principle, refer to Test Method D, Test Method for Specific Area and Immaturity Ratio of Cotton Fibers (Arealometer Method), 2 and to Test Method D, Test Method for Resistance to Air Flow as an Indication of Average Fiber Diameter of Wool Top, Card.

Spinning fineness (SF) is one of the wool quality characteristics widely assessed, and it is a refinement of two key wool quality attributesmean fibre diameter (FD) and coefficient of variation.

Determining Population. Some methods of determining the size of population are direct and indirect observations, sampling, and mark-and-recapture studies. YOU MIGHT ALSO LIKE Essentials of Business Research | Silver, Stevens, Kernek, Wrenn, Loudon.

Method of determining and expressing fineness of feed materials by sieving. Author(s): USA, American Society of Agricultural Engineers.

Author Affiliation: Niles Road, St. Joseph, MIUSA. One of the information on Sample Size. Sample is the part of the promotion strategy and highly effective if, the product is launched for the first time. they allow users to try the product for the time and create moment of truth environment.

the best art of Sample size is that you can gauge the effectiveness and if sample is presented in exceptional way then the result is positive. The three methods of determining population size are observation, mark and recapture, and sampling - Methods of sampling.

To ensure reliable and valid inferences from a sample, probability sampling technique is used to obtain unbiased results. The four most commonly used probability sampling methods in medicine are simple random sampling, systematic sampling, stratified sampling and cluster sampling.

select an appropriate sampling technique. Sampling frame is the source material from which a sample is drawn. There are different methods through which a sample can be selected from a sampling frame.

These methods can be broadly classified as probability and non-probability sampling methods. A good example of probabilityFile Size: KB. SAMPLING OF AGGREGATES FOP FOR AASHTO T 2 (11) Scope This procedure covers sampling of coarse, fine, or a combination of coarse and fine aggregates (CA and FA) in accordance with AASHTO T 2.

Sampling from conveyor belts, transport units, roadways, File Size: 26KB. Another factor that needs to be considered when measuring fibre fineness is that the cross-section of different fibre types varies in shape; wool has an approximately circular cross-section, raw cotton has a collapsed tubular cross-section and bast fibres are often irregular polygonial in cross-section (Fig.

(a)–(f)).Furthermore natural fibres usually exhibit cross-section variability Cited by: 1. Health Related Quality of Life (HRQoL) measures are becoming more frequently used in clinical trials and health services research, both as primary and secondary endpoints. Investigators are now asking statisticians for advice on how to plan and analyse studies using HRQoL measures, which includes questions on sample size.

Sample size requirements are critically dependent on the aims and Cited by: Method of determining and expressing fineness of feed materials by sieving. [] Wisconsin. University.

Cooperative Extension Programs. Due to the overriding importance of fibre diameter in determining wool price, by the IWTO for measuring wool sliver and tops in a number of improved methods, of measuring both mean.

The solution gives the details random sampling, systematic sampling, convenience sampling, stratified sampling, cluster sampling and other sampling methods. Definition and examples of nominal, ordinal, interval and ratio level of measurement are also given.Method - Extractive FTIR Method for the Measurement of Emissions From the Mineral Wool and Wool Fiberglass Industries (PDF) (12 pp, K) Contact Us to ask a question, provide feedback, or report a problem.8 Judgment Sampling Subjective selection of sites by an individual, therefore a potential for bias exists May be useful if all the units are visible and one can select a “representative” sample Requires extensive knowledge of problem and sampling area May result in good estimate with unknown variance - atypical members cannot be used to make.