Subject sectional classification

Under EPCRA, the ERA established an inventory of routine toxic chemicals that require emissions reporting. Eacilities subject to Section 313 are required to submit a toxic chemical release inventory form or Eorm R for specified chemicals, which is completed on an annual basis and is submitted by July 1 of every year. Eorm R notifies public and governmental agencies about routine releases (releases that occur as a result of daily production use). Eorm R applies to facilities of ten or more employees in businesses (with standard industrial classification (SIC) codes 20 through 39) that manufacture or use certain toxic chemicals in excess of certain amounts. 

The tubes that are around the flame get most of their heat energs t rom radiation. The tubes in the top of the chamber get their heat from com ec-tion as the hot exhaust gases rise up through the heater and heat ihc process fluid in the tubes. The principal classification of fired heaters relates to the orientation of the heating coil in the radiant section. The tube coils of vertical fired heaters are placed vertically along the walls of the combustion chamber. Firing also occurs vertically from the Hoor of the heater. All the tubes are subjected to radiant energy. 

Derivation of a classification rule, using the training set. This is the subject of Section 33.2. 

In Section 33.2.2 we showed how LDA classification can be described as a regression problem with class variables. As a regression model, LDA is subject to the problems described in Chapter 10. For instance, the number of variables should not exceed the number of objects. One solution is to apply feature selection or... 

High-pressure chemistry, although only a section of high-pressure science, has also been greatly developed in the last few decades, and the purpose of the present work is to illustrate and discuss the basic effects produced by ultrahigh pressures on chemical reactions. A classification of the processes occurring in materials subjected to high pressure has been proposed by Drickamer [11] and is... 

It is almost impossible to give a clear-cut compilation of answers to the question of which method or technique should be used for a particular investigation and in what way experimental data should be analyzed. Therefore this section pretends to be only an indication of trends that can be abstracted from the literature, inevitably influenced by the authors personal experiences and convictions. In order to give some structure to our considerations, a global classification of subjects into three fields, electro-analytical chemistry, applied electrochemistry, and fundamental electrochemistry, is made. 

Until now we have concentrated on solid surfaces. This section is about solid-solid interfaces. Such interfaces play an essential role in the stability of materials. The stability of materials is a complex subject in itself and we will not deal with it within the scope of this book. We will only provide some basic concepts and classifications. In the semiconductor industry,... 

In implementing the risk-based waste classification system developed in this Report, the selection of exposure scenarios appropriate to waste disposal is an important technical issue that must be addressed. NCRP believes that scenarios for inadvertent intrusion into near-surface disposal facilities are appropriate in classifying waste for purposes of disposal and, further, that scenarios involving permanent occupancy of disposal sites after loss of institutional control would be appropriate (see Section 6.1.3) such scenarios are commonly used in regulating near-surface disposal of low-level radioactive waste and in risk assessments at hazardous waste sites subject to remediation under CERCLA. 

The result from cluster analysis presented in Fig. 9-2 is subjected to MVDA (for mathematical fundamentals see Section 5.6 or [AHRENS and LAUTER, 1981]). The principle of MVDA is the separation of predicted classes of objects (sampling points). In simultaneous consideration of all the features observed (heavy metal content), the variance of the discriminant functions is maximized between the classes and minimized within them. The classification of new objects into a priori classes or the reclassification of the learning data set is carried out using the values of the discriminant function. These values represent linear combinations of the optimum separation set of the original features. The result of the reclassification is presented as follows ... 

The broad scope and diverse nature of the chapters in this volume made the process of dividing them into sections or subject areas somewhat difficult. Many chapters relate to more than one section. The common methods of subject classification according to fuel type (petroleum, natural gas, coal, etc.) was intentionally avoided so as to emphasize geochemical principles and controls that have common chemistry for all fuel types. 

It is useful to categorize the factors that influence toxicity within the following three classifications (1) the toxic substance and its matrix, (2) circumstances of exposure, and (3) the subject and its environment (see Figure 6.1). These are considered in the following sections. 

This chapter begins with three sections on basic concepts of classification. In the last four sections of the chapter, we describe the role of flow in separations. This subject relates also to classification because flow is one of the major variables distinguishing one class of separation methods from another. 

So far as the classification of the type of spectroscopy performed is concerned, the characterisation of the dynamical motions of the nuclei and electrons within a molecule is more important than the region of the electromagnetic spectrum in which the corresponding transitions occur. However, before we come to this in more detail, a brief discussion of the nature of electromagnetic radiation is necessary. This is actually a huge subject which, if tackled properly, takes us deeply into the details of classical and semiclassical electromagnetism, and even further into quantum electrodynamics. The basic foundations of the subject are Maxwell s equations, which we describe in appendix 1.1. We will make use of the results of these equations in the next section, referring the reader to the appendix if more detail is required. 

Assessment of the methods divided into chapters according to the above classification system is the subject of the next Section. 

The P-type versus E-type paragenetic classification of diamonds based on their inclusions is introduced in Section 2.05.4.1.3. The geochemical basis for this fundamental difference between inclusion types is discussed in review articles by Meyer (1987), Harris and Gurney (1979), Gurney (1989), and Kirkley et al. (1991), summarized in brief here and discussed in the context of newer SIMS trace-element data on inclusions. Meyer (1987) points out the importance of inclusions in diamonds for the study of the mantle. First, inclusions are the chief way to understand the relationship of diamonds to their mantle host lithologies. Second, inclusions often represent pristine, geochemically unaltered samples that are not subject to the chemical re-equilibration and alteration that affects the minerals in xenoliths and macrocry sts. 

The German publication corresponding to the United States Patent Gazette is the Ausziige section of the weekly Patentblatt. The latter contains various lists relating to patent applications and patents. The Ausziige presents the patent information in the order of the subject classification. 

Most chemists are familiar with the library catalog. It consists of a card or cards carrying bibliographic data only for each title on the library shelves. It may be a dictionary catalog containing cards filed alphabetically for each author and subject, or it may be only an author index to the books plus a shelf-list section. This shelf-list consists of one card for each title, arranged in the same classification order in which the books are filed on the shelves. 

Some time has elapsed since the original appeared, and we have attempted as far as possible to bring the subject-matter up to date. New colouring-matters have been introduced without altering Prof. Nietzki s method of classification, a method which has been very generally adopted since its appearance. In some cases (Primuline, Thioflavine Pyronine, c.) new sections might have been desirable we preferred, however, to leave the book in its original form. 

As an innovation, this year s Report combines the usual section on Properties and Reactions with the subject of Partial Synthesis into a single chapter. In earlier volumes, selection of subject matter for two separate chapters has perforce been somewhat arbitrary, and has not infrequently resulted in some duplication of material, where authors chose to emphasize different facets of the same piece of work. The present chapter retains the classification of Properties and Reactions used in previous volumes, but groups into additional sections the work which was concerned in particular with aspects of synthesis. 

Narrow and focus your subject by selecting an appropriate principle of division or classification. Some of the suggestions are appropriate for humorous essays ( The Three Best Breeds of Cats for Antisocial People ). For additional ideas, see the Suggestions for Writing section following the professional essay (page 271). 

---