Radical Self Research Articles

Rate Constant and Product Branching for the Vinyl Radical Self Reaction at T = 298 K

The rate constant and product branching for the self reaction of C2H3 has been measured using the discharge−flow kinetic technique coupled to mass spectrometric detection at T = 298 K and 1 Torr nominal pressure (He). C2H3 is produced by the reaction of F with C2H4, which also forms C2H3F + H. In addition to the C2H3 self reaction, C2H3 also decays by reaction with H and by wall loss processes. The result obtained by parameter fitting the C2H3 decay curves was k(C2H3 + C2H3) = (1.41 ± 0.60) × 10-10 cm3 molecule-1 s-1, where k is defined by d[C2H3]/dt = 2k[C2H3]2. Results from the product studies showed that the recombination product 1,3-butadiene was not observed at 1 Torr and that the ratio [C2H2] product formed/[C2H3]0 was 0.65 ± 0.14 for the combined C2H3 + C2H3 and C2H3 + H reactions. Both observations are consistent with C2H2 + C2H4 being the exclusive C2H3 + C2H3 products, since the maximum yield of C2H2 from the combined C2H3 + C2H3 and C2H3 + H reactions is 0.59. The experimental observations that k1 is independent of pressure and that no 1,3-butadiene (product of C2H3 combination) is observed at 1 Torr pressure requires a mechanism in which the chemically activated 1,3-butadiene undergoes a unimolecular reaction. It is postulated that the 1,3-butadiene first isomerizes to cyclobutene, which then unimolecularly decomposes to C2H2 and C2H4. Although the former reaction is well documented, the latter reaction has not been previously reported. RRKM calculations predict a pressure dependence similar to what is experimentally observed.

Nancy Gray Díaz, "The Radical Self: Metamorphosis to Animal Form in Modern Latin-American Narrative" (Book Review)

Nancy Gray Díaz, "The Radical Self: Metamorphosis to Animal Form in Modern Latin-American Narrative" (Book Review)

AM1/CI 3 × 3 studies on C-H and C-C bond dissociations

The C-H and C-C homolytic bond scissions in alkanes, alkenes and halogenated compounds, and the reverse reactions (radical self- and cross-combinations) were studied by means of the Austin model 1 (AM1) including configuration interaction (CI 3 × 3, open-shell excited singlet) in order to check on the applicability of the method for determining the energy profiles of bond scissions. The bond dissociation energies (BDEs) and the activation energies ( E A) of the combinations were calculated. The method predicts that BDEs are better than MNDO/CI 3 × 3 for determining C-H and C-C bond scissions yielding alkyl radicals. The method is also applicable when radicals with delocalized π-electron systems are formed. The predicted EA values of the self-combinations are superior to the values obtained with MNDO/CI 3 × 3.

The Radical Self. Metamorphosis to Animal Form in Modern Latin American Narrative

The Radical Self. Metamorphosis to Animal Form in Modern Latin American Narrative

The Radical Self: Metamorphosis to Animal Form in Modern Latin American Narrative by Nancy Gray Díaz (review)

The Radical Self: Metamorphosis to Animal Form in Modern Latin American Narrative by Nancy Gray Díaz (review)

The Radical Self: Metamorphosis to Animal Form in Modern Latin American Narrative

The Radical Self: Metamorphosis to Animal Form in Modern Latin American Narrative

The Radical Self: Metamorphosis to Animal Form in Modern Latin American Narrative

The Radical Self: Metamorphosis to Animal Form in Modern Latin American Narrative

The Radical Self: Metamorphosis to Animal Form in Modern Latin American Narrative

The Radical Self: Metamorphosis to Animal Form in Modern Latin American Narrative

The Rise of the Greek Socialist Party, by Michalis Spourdalakis

When the Panhellenic Socialist Movement (PASOK) formed the first Greek Socialist government, its stated aims of expelling US military bases, withdrawing Greece from NATO and of redistributing wealth, revealed it as a radical force in Europe's South and in world politics. This book presents a detailed examination of PASOK's remarkable 'short march to power' tracing the Party's development from its formation in 1974 at the end of the Junta period to electoral victory in 1981, and continuing thereafter with developments right up to the present. It examines its organisation; the frictions among its internal political currents; the pivotal role of its leader Andreas Papandreou; its social base and its effect upon the party system, the political culture and the state. It discusses its policies and record in government, showing how and why its original promises remained unfulfilled so that it is now 'an empty shadow of its old radical self'.

The radical self: metamorphosis to animal form in modern Latin American narrative

The radical self: metamorphosis to animal form in modern Latin American narrative

An Example of Self–Change: The Buddhist Path

The idea or indeed the possibility of self–change is rarely discussed in general terms, though many religious aims relate to it. I wish to introduce aset of concepts relevant to the understanding of the idea; and to exhibit the Buddhist path, as described in the Pali texts, as an example of radical self–change. The general concepts and the particular example will have muchto do with the senses in which, when a person acts or intends, the action or intention is truly his; and so will involve an examination of the notion of self–control.

A Taxonomy of Current Approaches to Systems Analysis

The discipline of systems analysis is still very young and in common with most other emerging disciplines it occasionally enters periods of radical self examination and re-thinking. The authors feel that we are in the midst of such a phase at present; new ideas abound, arguments rage, and the development of technology is a powerful impetus to the re-examination of ideas. The reason for the current turmoil in systems analysis is the emergence over the past few years of a number of new approaches or methodologies. These approaches have generally originated as academic ideas and been taken up and modified in the practising world of systems analysis. Thus there exists a confusing array of approaches. It is the purpose of this paper to examine some of the more fundamental approaches and to attempt to classify them. It is the authors' view that the approaches are not simple alternatives, but that they seek to do different things. The authors have identified six major approaches to systems analysis: (i) General Systems Theory Approach; (ii) Human Activity Systems Approach; (iii) Participative (Socio technical) Approach; (iv) Traditional (NCC, etc.) Approach; (v) Data Analysis Approach; (vi) Structured Systems (Functional) Approach. Except for the General Systems Theory Approach they are all used to some extent in the industry today. General Systems Theory is included as an approach because of its important influence on systems thinking in general and because of the contribution it has made to almost all the other identified approaches.