Performance related

Besides internal quaUty audits, there are audits conducted by external authorities for conformance to estabUshed quaUty systems. The two chief standards affecting the chemical industry are the U.S. Food and Dmg Administration Current Good Manufacturing Practice (GMP) regulation and the International Organization for Standardization ISO 9000 series. A quaUty system performance-related standard is the Malcolm Baldrige National QuaUty Award... 

In addition to platinum and related metals, the principal active component ia the multiflmctioaal systems is cerium oxide. Each catalytic coaverter coataias 50—100 g of finely divided ceria dispersed within the washcoat. Elucidatioa of the detailed behavior of cerium is difficult and compHcated by the presence of other additives, eg, lanthanum oxide, that perform related functions. Ceria acts as a stabilizer for the high surface area alumina, as a promoter of the water gas shift reaction, as an oxygen storage component, and as an enhancer of the NO reduction capability of rhodium. 

The selection of a suitable matrix for a composite material involves many factors, and is especially important because the matrix is usually the weak and flexible link in all properties of a two-phase composite material. The matrix selection factors include ability of the matrix to wet the fiber (which affects the fiber-matrix interface strength), ease of processing, resulting laminate quality, and the temperature limit to which the matrix can be subjected. Other performance-related factors include strain-to-failure, environmental resistance, density, and cost. 

The minimum number of the tube rows recommended to establish a proper air flow pattern is 4, although 3 rows can be used. The typical unit has 4-6 rows of tubes, but more can be used. Although more heat can be transferred by increasing the number of tubes, the required fan horsepower will be increased however, this balance must be optimized for an effective economical design. Tubes are laid out on transverse or longitudinal patterns however, the transverse is usually used due to the improved performance related to pressure drop and heat transfer. The tube pitch is quite important for best air-side performance. A typical representative tube arrangement for design optimization is for hare-tube O.D., tinned-tube O.D., and tube pitch ... 

Dimensional Analysis. In the design of rather simple devices or systems, dimensional analysis can be used in conjunction with physical model experimental investigations to gain insight into the performance of a particular design concept. It is usually possible to define the performance of a simple device or system with a certain number of well chosen geometric and performance related variables that describe the device or system. Once these variables have been selected, dimensional analysis can be used to ... 

Fracture mechanic The fracture mechanics theory developed for metals is also adaptable for use with plastics. The basic concepts remain the same, but since metals and plastics are different they require different techniques to describe their fatigue-failure behaviors. Some of the comments made about crack and fracture influences on fatigue performance relate to the theory of fracture mechanics. The fracture mechanics theory method, along with readily... 

Performance relations, variables, 306 Propeller, 290 Scale up, 312, 314-317, 332 Turbines, 290, 291 Turbulence, 326 Types performance, 297 Mixing of liquids, 288... 

Extensive investigations have been performed related to the synthesis of new adamantane derivatives with better therapeutic actions and less adverse effects. For example, it has been proved that adamantylamino-pyrimidines and -pyridines are strong stimulants of mmor necrosis factor-a (TNF-a) [132]. TNF is a substance that can improve the body s namral response to cancer by killing cancer cells. Another example is 1,6-diaminodiamantane [87], which possesses an antitumor and antibacterial activity. Also, many derivatives of aminoadamantanes have antiviral activity like 3-(2-adamantyl) pyrolidines with two pharmacophoric amine groups, which have antiviral activity against influenza-A virus [133]. 

Lower chemical reactivity with non-target molecules is useful for another performance-related reason. Microorganisms prefer the protection and luxuriant environment in biofilms (the adherent microbial communities that cause detrimental surface-fouling effects in water cooling systems). Most (>99%) of the viable microorganisms in industrial systems are found in biofilms, not floating around freely in the bulk recirculating water. Compared to unstabilized chlorine or bromine, STABREX more effectively removes and disinfects biofilms as shown in Table 6. 

For nonpharmacopeial materials a full specification should be included in the application. This should include appropriate tests and requirements for physical characteristics, identification, relevant purity tests, and performance-related tests. Characteristics likely to influence bioavailability of the finished product should be controlled. Routine tests and specifications should be described. Methods should be validated. The material should be fully characterized, with full data on the chemistry concerned and including consideration of the safety of the excipient. Any relevant European Directive requirements or other international specifications should be met, but additional requirements might apply depending on the intended use of the product—e.g., for materials to be used in sterile products. 

Blockers blunt the peripheral autonomic symptoms of arousal (e.g., rapid heart rate, sweating, blushing, and tremor) and are often used to decrease anxiety in performance-related situations. For specific SAD, 10 to 80 mg of propranolol or 25 to 100 mg of atenolol can be taken 1 hour before the performance. A test dose should be taken at home on a day before the performance to be sure adverse effects will not be problematic. 

Insomnia is associated with severe daytime dysfunction and low performance, related to traffic accidents and work absenteeism [7], with increasing medical burden, attributable to both direct medical and indirect costs [8]. 

Solvents are substances that are liquid under the conditions of application and in which other substances can dissolve, and from which they can be recovered unchanged on removal (Marcus, 1998). Solvents for different applications need to have different set of properties with the one common property being its ability to dissolve the substance under consideration. These properties can be broadly classified as performance related properties, physicochemical... 

Mixture property Define the model to be used for liquid activity coefficient calculation, specify the binary mixture (composition, temperature, pressure), select the solute to be extracted, the type of phase equilibrium calculation (VLE or LLE) and finally, specify desired solvent performance related properties (solvent power, selectivity, etc.)... 

A critical safety issue of using diesel-ethanol blends relates to flashpoint and flammability. E-diesel blends containing 10-15% ethanol have the vapor pressure and flammability limits of ethanol. This means that ethanol concentrations in enclosed spaces such as fuel storage and vehicle fuel tanks are flammable over the temperature range 13-42 °C. Thus, there are higher risks of fire and explosion than with diesel fuel, or even gasoline. Other vehicle performance-related concerns are (a) a decreased maximum power (b) an increased incidence of fuel pump vapor lock and (c) a reduced fuel pump and fuel injector life due to the decreased lubricity of ethanol. 

In a similar design, DArrigo et al. [78] also used porous silicon as the DL in a fuel cell. The porous silicon was deposited by chemical vapor deposition (CVD) on top of a silicon wafer that already had microgrooves machined on it. Then, catalytic particles were deposited on top of fhe porous silicon layer. Unfortunately, no performance-related data indicating whether the cell was acceptable or not were published for fhis design. 

Sources and detectors Specific discussions of sources and detectors have been covered elsewhere in this article. The issues here are more service and performance related. Most sources have a finite lifetime, and are service replaceable items. They also generate heat, which must be successfully dissipated to prevent localized heating problems. Detectors are of similar concern. For most applications, where the interferometer is operated at low speeds, without any undesirable vibrational/mechanical problems, the traditional lithium tantalate or DTGS detectors are used. These pyroelectric devices operate nominally at room temperature and do not require supplemental cooling to function, and are linear over three or four decades. 

An early study of the influence of composition heterogeneity on the physical properties of copolymers was undertaken by Nielson (4), but to the knowledge of the authors, there have been no similar Investigations involving tin-based polymers. In this work a range of different acrylic co- and terpolymers has been prepared and the effects of composition and composition distribution on the physical and performance-related properties of the polymers in their native state and In paints have been examined. 

The investigator then follows the Human Performance Difficulty category through a series of questions (or subcategories). These questions help the investigator identify which of several human performance related branches (sometimes known as basic causes) to investigate further. (Some predefined trees use statements rather than questions, but the selection process is similar.)... 

The Liebowitz Social Anxiety Scale (LSAS) measures fear, anxiety and avoidant behavior in 24 commonly feared social situations and performances. There are 13 performance-related items and 11 items that rate the social situations (Heimberg et al, 1999). The LSAS is the standard established outcome measure in most of the pivotal trials for social anxiety. Cut-offs of 30 for social anxiety disorder and 60 for its generalized subtype on the LSAS total scores represent a balance of specificity and sensitivity. There are two valid versions of the LSAS a clinician-administered version and a self-rating version (Fresco et al.. 2001). 

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