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Author: Dorothy L. Bennett
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 186
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Book Description
Author: Dorothy L. Bennett
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 186
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Book Description
Author:
Publisher:
ISBN:
Category : Sewage
Languages : en
Pages : 420
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Author:
Publisher:
ISBN:
Category : Drinking water
Languages : en
Pages : 12
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Book Description
Author: David M. Nielsen
Publisher: CRC Press
ISBN: 1420042793
Category : Science
Languages : en
Pages : 328
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Book Description
Tremendous improvements in ground-water sampling methodologies and analytical technologies have made it possible to collect and analyze truly representative samples to detect increasingly lower levels of contaminants-now in the sub-parts-per-billion range. Though these new methods produce more accurate and precise data and are less expensive, many
Author: Dorothy L. Bennett
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 70
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Book Description
Author: Jon Michael Miller
Publisher:
ISBN:
Category : Diagnostic specimens
Languages : en
Pages : 76
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Author:
Publisher:
ISBN:
Category : Environmental monitoring
Languages : en
Pages : 90
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Book Description
Author: Patrick Echlin
Publisher: Springer Science & Business Media
ISBN: 0387857311
Category : Technology & Engineering
Languages : en
Pages : 329
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Book Description
Scanning electr on microscopy (SEM) and x-ray microanalysis can produce magnified images and in situ chemical information from virtually any type of specimen. The two instruments generally operate in a high vacuum and a very dry environment in order to produce the high energy beam of electrons needed for imaging and analysis. With a few notable exceptions, most specimens destined for study in the SEM are poor conductors and composed of beam sensitive light elements containing variable amounts of water. In the SEM, the imaging system depends on the specimen being sufficiently electrically conductive to ensure that the bulk of the incoming electrons go to ground. The formation of the image depends on collecting the different signals that are scattered as a consequence of the high energy beam interacting with the sample. Backscattered electrons and secondary electrons are generated within the primary beam-sample interactive volume and are the two principal signals used to form images. The backscattered electron coefficient ( ? ) increases with increasing atomic number of the specimen, whereas the secondary electron coefficient ( ? ) is relatively insensitive to atomic number. This fundamental diff- ence in the two signals can have an important effect on the way samples may need to be prepared. The analytical system depends on collecting the x-ray photons that are generated within the sample as a consequence of interaction with the same high energy beam of primary electrons used to produce images.
Author: Steven B. Sample
Publisher: John Wiley & Sons
ISBN: 0787967076
Category : Business & Economics
Languages : de
Pages : 231
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Book Description
In this offbeat approach to leadership, college president Steven B. Sample-the man who turned the University of Southern California into one of the most respected and highly rated universities in the country-challenges many conventional teachings on the subject. Here, Sample outlines an iconoclastic style of leadership that flies in the face of current leadership thought, but a style that unquestionably works, nevertheless. Sample urges leaders and aspiring leaders to focus on some key counterintuitive truths. He offers his own down-to-earth, homespun, and often provocative advice on some complex and thoughtful issues. And he provides many practical, if controversial, tactics for successful leadership, suggesting, among other things, that leaders should sometimes compromise their principles, not read everything that comes across their desks, and always put off decisions.
Author:
Publisher: Elsevier
ISBN: 9780080932217
Category : Mathematics
Languages : en
Pages : 722
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Book Description
This new handbook contains the most comprehensive account of sample surveys theory and practice to date. It is a second volume on sample surveys, with the goal of updating and extending the sampling volume published as volume 6 of the Handbook of Statistics in 1988. The present handbook is divided into two volumes (29A and 29B), with a total of 41 chapters, covering current developments in almost every aspect of sample surveys, with references to important contributions and available software. It can serve as a self contained guide to researchers and practitioners, with appropriate balance between theory and real life applications. Each of the two volumes is divided into three parts, with each part preceded by an introduction, summarizing the main developments in the areas covered in that part. Volume 29A deals with methods of sample selection and data processing, with the later including editing and imputation, handling of outliers and measurement errors, and methods of disclosure control. The volume contains also a large variety of applications in specialized areas such as household and business surveys, marketing research, opinion polls and censuses. Volume 29B is concerned with inference, distinguishing between design-based and model-based methods and focusing on specific problems such as small area estimation, analysis of longitudinal data, categorical data analysis and inference on distribution functions. The volume contains also chapters dealing with case-control studies, asymptotic properties of estimators and decision theoretic aspects. Comprehensive account of recent developments in sample survey theory and practice Discusses a wide variety of diverse applications Comprehensive bibliography
