Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Processes defined

As was said in the introduction (Section 2.1), chemical structures are the universal and the most natural language of chemists, but not for computers. Computers woi k with bits packed into words or bytes, and they perceive neither atoms noi bonds. On the other hand, human beings do not cope with bits very well. Instead of thinking in terms of 0 and 1, chemists try to build models of the world of molecules. The models ai e conceptually quite simple 2D plots of molecular sti uctures or projections of 3D structures onto a plane. The problem is how to transfer these models to computers and how to make computers understand them. This communication must somehow be handled by widely understood input and output processes. The chemists way of thinking about structures must be translated into computers internal, machine representation through one or more intermediate steps or representations (sec figure 2-23, The input/output processes defined... [Pg.42]

Are R D practices linked to business practices Are work processes those needed to implement the plans Are work processes defined, disciplined, and structured Is the human side of work practices understood Are there metrics related to the goals/results of the work processes ... [Pg.131]

Not all required tasks and hazards can be predicted during the development of a HASP. The plan describes the ongoing hazard analysis and work control process, defines the means of identifying job- or task-based requirements and controls, and discusses ways to inform workers about requirements derived from ongoing job or task hazard analyses. [Pg.58]

Find out the customer reliability requirements of the process. Define and obtain the customer s acceptance of the needs for ventilation system reliability (e.g., what is the allowed break-off rime). [Pg.359]

The capability index for a stable process defined as the quotient of tolerance width and process capability where process capability is the 6a range of a process s inherent variation. [Pg.554]

The risk evaluation process defines the equipment, hazards, and events leading to an accident. It detennines the probability tliat an accident will occur. The severity and acceptability of the risk are also evaluated. [Pg.435]

This result can now be used to verify our earlier statement that the gaussian Markov process defined by Eq. (3-218) is a good model for RC filtered vacuum tube noise. We have already seen that vacuum tube noise is essentially gaussian (as long as n is large) and that its spectrum is essentially white .70 A reasonable model for RC filtered... [Pg.188]

Equation (3-325), along with the fact that Y(t) has zero mean and is gaussian, completely specifies Y(t) as a random process. Detailed expressions for the characteristic function of the finite order distributions of Y(t) can be calculated by means of Eq. (3-271). A straightforward, although somewhat tedious, calculation of the characteristic function of the finite-order distributions of the gaussian Markov process defined by Eq. (3-218) now shows that these two processes are in fact identical, thus proving our assertion. [Pg.189]

In the previous section, we mentioned that discussing mutual expectations is highly important for both mentor and mentee. This process defines the ground rules for the relationship, and is a vital means by which future disappointments can be avoided. Knowing about roles and duties also plays an important part in maintaining a mentoring relationship. This section is devoted to taking a close-up look at the roles and duties of mentors and mentees. [Pg.182]

Sykes et have proposed a transition state involving a hydroxide bridge for the processes defined by. ... [Pg.86]

Within any medium of the environment, three types of process (defined here as intramedia processes) govern the pollutant concentration at each point at each time ... [Pg.100]

While for thermal reactions one usually does not correlate the energy input with the amount of product formed, electrochemists and photochemists are certainly more energy-minded . The first ones use the current yield to define the amount of product formed per electrons consumed. The latter ones use the so called quantum yield which is defined as the ratio of number of molecules undergoing a particular process from an excited state over moles of photons absorbed by the system, or in other words, the ratio of the rate constant for the process defined over the sum of all rate constants for all possible processes from this excited state (1.4). Thus, if for every photon absorbed, a molecule undergoes only one chemical process, the quantum yield for this process is unity if other processes compete it will be less than unity. [Pg.12]

Vesicular proteins and lipids that are destined for the plasma membrane leave the TGN sorting station continuously. Incorporation into the plasma membrane is typically targeted to a particular membrane domain (dendrite, axon, presynaptic, postsynaptic membrane, etc.) but may or may not be triggered by extracellular stimuli. Exocytosis is the eukaryotic cellular process defined as the fusion of the vesicular membrane with the plasma membrane, leading to continuity between the intravesicular space and the extracellular space. Exocytosis carries out two main functions it provides membrane proteins and lipids from the vesicle membrane to the plasma membrane and releases the soluble contents of the lumen (proteins, peptides, etc.) to the extracellular milieu. Historically, exocytosis has been subdivided into constitutive and regulated (Fig. 9-6), where release of classical neurotransmitters at the synaptic terminal is a special case of regulated secretion [54]. [Pg.151]

Ittner s analysis displays the familiar contrast between control and knowledge which often demarcated the engineer s work from that of the scientist. But, more specifically, it also denies any role to unit processes defined as chemical processes. For Ittner, the unit process, once it is examined closely, can be... [Pg.60]

Relaxation dispersion data for water on Cab-O-Sil, which is a monodis-perse silica fine particulate, are shown in Fig. 2 (45). The data are analyzed in terms of the model summarized schematically in Fig. 3. The y process characterizes the high frequency local motions of the liquid in the surface phase and defines the high field relaxation dispersion. There is little field dependence because the local motions are rapid. The p process defines the power-law region of the relaxation dispersion in this model and characterizes the molecular reorientations mediated by translational displacements on the length scale of the order of the monomer size, or the particle size. The a process represents averaging of molecular orientations by translational displacements on the order of the particle cluster size, which is limited to the long time or low frequency end by exchange with bulk or free water. This model has been discussed in a number of contexts and extended studies have been conducted (34,41,43). [Pg.299]

First, the laboratory plarrs its activities and then it determines the customer related process, defines the analysis requirements and develops the commirrrication channels with the customers. The third stage is to design and develop new products, i.e. new... [Pg.56]

Theme Level 1 (No Formal Approach) Level 2 (Process Defined) Level 3 (Proactively Managed) Level 4 (Continuous Improvement) Level 5 (Best in Class)... [Pg.278]


See other pages where Processes defined is mentioned: [Pg.954]    [Pg.1269]    [Pg.245]    [Pg.498]    [Pg.2057]    [Pg.393]    [Pg.643]    [Pg.129]    [Pg.655]    [Pg.84]    [Pg.322]    [Pg.593]    [Pg.84]    [Pg.295]    [Pg.426]    [Pg.65]    [Pg.107]    [Pg.260]    [Pg.330]    [Pg.165]    [Pg.224]    [Pg.187]    [Pg.133]    [Pg.59]    [Pg.5]    [Pg.498]    [Pg.1369]    [Pg.107]   
See also in sourсe #XX -- [ Pg.31 ]

See also in sourсe #XX -- [ Pg.4 ]

See also in sourсe #XX -- [ Pg.99 , Pg.347 ]

See also in sourсe #XX -- [ Pg.256 ]

See also in sourсe #XX -- [ Pg.42 ]




SEARCH



© 2024 chempedia.info