Tactical Classification

This classification is based on the criterion of the tactical emplo5unent of the war gases. From this view-point they are divided into two groups  

Non-persistent Gases. Including substances which diffuse into the air in a short time, losing some of their toxic concentration chlorine, phosgene, hydrocyanic acid, etc. 

Persistent Gases. Including substances which vaporise only slowly and remain on the ground for long periods in the liquid or solid state, still retaining their aggressive power dichloroethyl sulphide, etc. 

This classification also lacks neatness and precision, for the place of some substances in it is doubtful. It is proposed nowadays to add a third intermediate group, to include substances whose vapour tension lies between the gases of the first group and those of the second. This third group has been termed that of the Semi-persistent Gases.  

Another tactical classification which may be mentioned is one largely employed in text-books on chemical warfare and was in use in Germany during the war. In this classification the gases are divided into the following four classes  

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Agent, common name Chemical name cws. symbol Physiological claaslfioation Tactical classification persistency (summer) Persistency (winter)... 

The rate of action of a chemical agent is the rate at which the body reacts to or is affected by that agent. The rate varies widely, even to those of similar tactical or physiological classification. For example, blister agent HD causes no immediate sensation on the skin. Skin effects usually occur several hours later (some cases result in delays of 10-12 days before symptoms appear). In contrast, lewisite produces an immediate burning sensation on the skin upon contact and blistering in about 13 h. Decontamination immediately (within 4-5 min) will prevent serious blister agent effects. 

Classification, Missiles are commonly classified by their launch and target environments, as well as by popular names. Other methods of classifying guided missiles are by trajectory, speed (subsonic, sonic or supersonic), propulsion (air breathers, usually jets or rockets), guidance (command, Inertial or homing), payload (such as nuclear, high explosive, or electronic jammer), and purpose (strategic or tactical, offensive or defensive)... 

Note This classification may also be applied to small arms ammunition B)According to Tactical Use. This includes... 

Several reviews of early work on topotactic polymerizations and isomeriza-tions are available, and the reader is referred to the summaries of Morawetz [88] and Gougoutas [8] for a more complete account. The earliest study of a topotactic reaction appears to have been the observation, in 1932, of the polymerization of trioxane to poly-oxy-methylene [89]. Similar polymerizations of tetraoxane [90] and of trithiane [91 ] have also been reported to show retention of crystallographic axes from the monomer lattice. Other examples are discussed below. The topo-tacticity of a reaction can be determined solely by x-ray crystallographic analysis at the reactant and product endpoints. Thus a simple classification of a reaction as topotactic tells very little about how the structure of the crystal lattice changed in the course of reaction. 

Other Classification Criteria. Other levels of classification should be superimposed on the above. These include latex, suspension, and bulk type syntheses, all of which result in different properties of the final materials. Uses of plastic-forming and elastomer-forming monomers and crystalline and amorphous structures must be distinguished. The tacticity of the polymers is sometimes important. Of course, the ratio of both polymer masses dictates the overall morphology. Physical operations such as swelling, annealing, and orienting must be considered in any complete treatment. 

STRATEGIC AND TACTICAL FACTORS IN WAREHOUSE OPERATION 3.1. Classification by Implementation Time... 

At the tactical level, however, more simulation-based approaches can be found. Table 4.1 shows a classification of literature for integrated SC configuration and operations planning where 7 out of 20 reviewed articles propose simulation-based approaches. 

For the classification of ordered or regular polymers, we shall be concerned only with stereoisomerism in the main chain. In the main chain, or, as is sometimes said, the backbone of the polymer, two kinds of stereoisomerism can exist. The first arises from asymmetric carbon atoms in the chain, and the second from double bonds that form part of the links in the backbone. The backbone is thus made up of repeating units, each of which can be a source of stereoisomerism. If the units are disposed in an ordered way we have what is called a tactic polymer. This will later be defined more specifically. 

Dragon Eye is a tactical reconnaissance and surveillance UAV that is currently used by the U.S. Marine Corps. While it does not fit within the MAV classification. Dragon Eye is smaller than most commercially available UAVs, with a wingspan of 1.1m and a mass of 2.3 kg. AeroVi-ronment s most famous MAV is the Black Widow, show in Fig. la. Due to the desire to have the maximum possible wing area, but still fit within the MAV definition. 

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