Big Chemical Encyclopedia

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

Articles Figures Tables About

Creation event

We recall here that estimates on the basis of a simple model of the mean number of defects in a cluster [25, 26, 28] gave Uq = ro/r = 3.43, where r is a mean distance between defects. The mean number of particles in a cluster is N = 120. These values correlate with the values of Uq from the computer experiment, which obtained Uq 5 and a mean number of defects in a cluster, respectively, of about 100. (As follows from the pattern of accumulation for L = 2000 and l — 5 with a total number of creation events of 5 x 105 [107].)... [Pg.447]

The observation that both quasars and Seyfert galaxies appear to be exploding objects that release massive amounts of matter, ostensibly from nowhere [105] - p.343, in a mini-creation event, provides this mechanism. To complete the cycle it is only necessary to identify the black-hole singularity with the origin of the quasar emission. It becomes a viable possibility if the black hole and the quasar are on opposite sides of an interface between two regions of space-time. [Pg.290]

Proponents of creationism believe that the species we currently have were created as recounted in the book of Genesis in the Bible. This retelling asserts that God created all life about 6,000 years ago in one mass creation event. However, scientific evidence casts doubt on creationism. [Pg.100]

The second environmental factor is the attacker population. [18] shows that the exploit creation may occur according to a Pareto probabilistic distribution. However, knowing the exact date of Slammer worm creation, we modeled the worm creation event by a deterministically. To model system attacks, we assume exponential probabilistic distributions. This choice was motivated by the need of having a density function with a high decrease and not by the need of the memory less property of this density distribution. The data published in [29,30] help us to calculate the attack rate. Nevertheless, the SAN model developed in our study can be run using other types of distributions. [Pg.99]

Particle-Bubble Attachment. In the above, principles leading to creation of desired hydrophobicity/hydrophihcity of the particles has been discussed. The next step is to create conditions for particle-bubble contact, attachment, and their removal, which is simply described as a combination of three stochastic events with which are associated the probability of particle-bubble colhsion, probabihty of attachment, and probability of retention of attachment. The first term is controlled by the hydrodynamic conditions prevaihng in the flotation unit. The second is determined by the surface forces. The third is dependent on the s irvival of the laden bubble by liq ud t irbulence and impacts by the other suspended particles. A detailed description of the hydrodynamic and other physical aspects of flotation is found in the monograph by Schulze (19 ). [Pg.1810]

Up to this point we have addressed primarily the flaw structure and energy concepts in stress-wave loaded solids governing the creation of new fracture surface area (or the mean fragment size) in catastrophic fragmentation events. It remains to consider a concept which is frequently the end concern in impulsive fracture applications, namely, the distribution in sizes of the particles produced in the dynamic fragmentation event. [Pg.295]

Enzyme reactions, like all chemical events, are dynamic. Information coming to us from experiments is not dynamic even though the intervals of time separating observations may be quite small. In addition, much information is denied to us because of technological limitations in the detection of chemical changes. Our models would be improved if we could observe and record all concentrations at very small intervals of time. One approach to this information lies in the creation of a model in which we know all of the concentrations at any time and know something of the structural attributes of each ingredient. A class of models based on computer simulations, such as molecular dynamics, Monte Carlo simulations, and cellular automata, offer such a possibility. [Pg.140]

The Medical Dictionary for Regulatory Activities (MedDRA) is a creation of the International Conference on Harmonization, and it is used to categorize and code diseases, disorders, and adverse events. The five levels and associated codes to the MedDRA coding hierarchy are as follows ... [Pg.109]

Medical Dictionary for Regulatory Activities a creation of the International Conference on Harmonisation used to categorize and code diseases, disorders, and adverse events. [Pg.313]

The condensation reactions described above are unique in yet another sense. The conversion of an amine, a basic residue, to a neutral imide occurs with the simultaneous creation of a carboxylic acid nearby. In one synthetic event, an amine acts as the template and is converted into a structure that is the complement of an amine in size, shape and functionality. In this manner the triacid 15 shows high selectivity toward the parent triamine in binding experiments. Complementarity in binding is self-evident. Cyclodextrins for example, provide a hydrophobic inner surface complementary to structures such as benzenes, adamantanes and ferrocenes having appropriate shapes and sizes 12) (cf. 1). Complementary functionality has been harder to arrange in macrocycles the lone pairs of the oxygens of crown ethers and the 7t-surfaces of the cyclo-phanes are relatively inert13). Catalytically useful functionality such as carboxylic acids and their derivatives are available for the first time within these new molecular clefts. [Pg.200]

There is no doubt that in those times, all civilisations considered that there was a connection between natural events and their myths of the Earth s creation. Thus most of the Egyptians—whichever gods they worshipped—shared the common belief that the creation of the Earth could be compared with the appearance of a mound of land from the primeval ocean, just as every year they experienced the re-emergence of the land from the receding Nile floods. [Pg.4]

Given the intensity of discussion of both creation and intelligent design, both of which propose an outside influence on evolution which has no simple scientific explanation, we must make our position clear. As far as we can see the directional character of evolution of our ecosystem, illustrated by the cone on the cover of this book, requires only one act for which we can see no explanation. We know of no cause of the Big Bang and the limitations it imposed on the cosmos observed in the laws of Nature. It is these laws alone which we use in our analysis. The laws contain possibilities both of systematic development which is the centre of our discussion and of random events. The first we relate, in the evolution of life, to chemotypes and the second to the appearance of species within chemotypes, see the cover of this book. At no time in this chapter, or in any other chapter do we invoke any other kind of activity. [Pg.413]

A few recent events make it particularly interesting to valuate the fire hazard resulting from the burning of PVC materials, when they are present in a plenum. These include the recent regulations promulgated in New York State regarding the creation of a data base for smoke... [Pg.595]

Time hung heavy on the defense s hands. They could not deny the terrible acceleration of events and the re-creation of that last month seemed interminable. Yet they had to speak. They chose to break up the matter into a confusion of sociological flashbacks that might give it a more leisurely perspective. [Pg.334]


See other pages where Creation event is mentioned: [Pg.451]    [Pg.11]    [Pg.135]    [Pg.451]    [Pg.15]    [Pg.151]    [Pg.145]    [Pg.194]    [Pg.197]    [Pg.451]    [Pg.11]    [Pg.135]    [Pg.451]    [Pg.15]    [Pg.151]    [Pg.145]    [Pg.194]    [Pg.197]    [Pg.3070]    [Pg.249]    [Pg.265]    [Pg.7]    [Pg.347]    [Pg.423]    [Pg.424]    [Pg.733]    [Pg.387]    [Pg.251]    [Pg.249]    [Pg.90]    [Pg.38]    [Pg.652]    [Pg.654]    [Pg.252]    [Pg.394]    [Pg.440]    [Pg.465]    [Pg.172]    [Pg.634]    [Pg.33]    [Pg.21]    [Pg.44]    [Pg.127]    [Pg.194]   
See also in sourсe #XX -- [ Pg.194 , Pg.197 ]




SEARCH



Creation

© 2024 chempedia.info