Fifth ISSOL meeting and eighth international conference on the origin of life

Fifth ISSOL meeting and eighth international conference on the origin of life

Scattering - scattering by aerosols, water droplets, rough surfaces; multiple scatter effects Stochastic methods - propagation and scattering as stoch...

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Scattering - scattering by aerosols, water droplets, rough surfaces; multiple scatter effects Stochastic methods - propagation and scattering as stochastic processes. The deadline for submission of abstracts was 15 December address: OIWOMPSA Via Gustav0 Modena 19 50121 Florence, Italy

1.19. SIXTH INTERNATIONAL CONFERENCE ON CHRONOLOGY AND ISCYl-OPEGEOLOGY””

1985. Contact

GEOCHRONOLOGY,

COSMO-

Cambridge, UK, 30 June-4 July 1986 The Sixth Inte~ation~ Conference on Ge~hronology, Cosmochronology and Isotope Geology will be held in Cambridge, UK, from 30 June to 4 July 1986. It is sponsored by IAVCEI, the IUGS Sub-Commission on Geochronology, the International Association of Geochemistry and Cosmochemistry and the Geochemical Society. Parallel scientific sessions will be organized to cover the fields of geo- and cosmochronolo~ and isotope geology. In addition, it is proposed to organize special symposia on selected subjects and any suggestions for these are welcome. Adequate space will be available for small discussion groups and workshops, and poster sessions. There will be a registration fee of approximately f 50 reduced to f 25 for students.

1.20. FIFTH ISSOL MEETING AND EIGHTH INTERNATIONAL CONFERENCE ON THE ORIGIN OF LIFE

Berkeley, California, USA, 21-25 July 1986 Scientijic Progmrnme

Several types of activities are planned for the scientific sessions. The major foci of the Meeting will be provided by four symposia. Two additional topics will be highlighted in the format of scientific debates. Completing the programme will be topical general sessions with contributed papers, and poster sessions, the latter encompassing the topics of the symposia, general sessions and debates. (“)Extract from IUGG Chronicle No. 174 of September 1985.

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Symposia (S)

Together the topics of the four symposia afford a conceptual framework that progresses from description of the primitive environment to models of the replicating systems that could have emerged from it. Sl. What were conditions like on the primitive Earth? Theoretical and comparative planetology, extrapolations of the geological record, model studies of environmental processes pertinent to prebiotic evolution, etc. S2. What is primitive in biology? Determinations made from study of contemporary organisms, enzyme/gene sequences, evolution of metabolic pathways, variations in structures and functions among organisms, etc. S3. How did bioenergetic systems develop in the prebiotic milieu? Structure, function, and antiquity of contemporary systems; chemical systems modelled after biological ones; nature of energy sources and their fluxes; interaction of sources with the prebiotic environment, etc. S4. What were the first self-replicating systems? Models embodying genetic function: nucleic acid-like or protein-like, or both, or mineral-like; systems consisting only of physical-chemical interactions coupled with and maintained by persistent environmental conditions; etc.

General (G) and Poster Sessions The topics common to the general sessions (Gl to G6 below) and poster

sessions are couched in broad thematic terms to accommodate theoretical and experimental contributions from all pertinent disciplines. The poster sessions can accommodate papers addressing the topics of the symposia and debates as well as those of the general sessions. Gl. Prebiotic evolution in extraterrestrial environments. G2. Models for the development of biological structures and functions. G3. Early biological evolution as inferred from contemporary organisms. G4. The geological record of early biological evolution. G5. Exobiology and space missions. G6. Models for development of biological structures and functions.

Debates (0)

Ground rules for the debates have been formulated and teams have been selected by the LOC. Dl. What were the first enzymes: proteins or nucleic acids? D2. What were the first living systems: mineralic/autotrophic or organic/ heterotrophic? 28

Types of Presentations

Oral presentations will be given in the symposia and general sessions. The symposia will include both invited papers (nominally three per symposium) and contributed papers. The general sessions will have only contributed papers. Each invited speaker will be allotted 45 minutes, including 15 minutes for discussion. The contributed papers in both the symposia and general sessions will be allotted 20 minutes, including 5 minutes for discussion. Oral presentations should be accompanied only by 35mm slides to ensure visibility throughout the Conference Hall. Contact point: Dr. Sherwood Chang Co-Chairman, ISSOLLOC P.O. Box 152 Moffett Field, CA 94035 U.S.A. Telephone: 1-415-694-5989 (Vera Buescher)

1.21.INTERNATIONAL SYMPOSIUMON NATURALAND MAN-MADE HAZARDS””

Rimouski and Quebec City, Canada, 3-9 August 1986 An International Symposium on Natural and Man-Made Hazards, sponsored by The Tsunami Society, will be held at Universite du Quebec 1 Rimouski from 3 to 9 August 1986. The objectives of the Symposium are to promote the advancement of the hazards sciences, to perceive and exploit those aspects that are similar for some of the various hazards, to review the newest developments in a few selected fields, and also to outline new directions for future research. The hazardous aspects of the following topics will be included in the Symposium. Air

Tropical and extra-tropical cyclones Thunderstorms, squall lines, lightning, hail, rainfall, snow, acid rain, nuclear winter, carbon dioxide effects, climatic changes, clear air turbulence, air pollution, visibility, fog. Water

Tsunamis, storm, surges, wind waves, edge waves, swell, abnormal water levels, tides and tidal bores, hydraulic jumps, flash floods, water spouts, ice flows, icebergs, icing on marine structures, ice jams in rivers, ice rideup on shore, man-made storage of water resources and their environmental effects, water pollution. “?)Extract

from IUGG Chronicle

No. 174 of September

1985.

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