Large-scale structures of high galactic latitude dark clouds

1986 ◽  
Vol 118 (1-2) ◽  
pp. 409-410 ◽  
Author(s):  
Yoshio Tomita
Keyword(s):  
Large Scale ◽  
Galactic Latitude ◽  
High Galactic Latitude ◽  
Dark Clouds ◽  
Large Scale Structures ◽  
Scale Structures

scholarly journals Observation of the Large Scale Structures of Dark Clouds

1987 ◽  
Vol 115 ◽  
pp. 51-55
Author(s):  
Yoshio Tomita
Keyword(s):  
Molecular Cloud ◽  
Large Scale ◽  
Radio Observations ◽  
Dark Clouds ◽  
Large Scale Structures ◽  
Destruction Mechanism ◽  
Scale Structures ◽  
Cloud Cores

Owing to the drastic progress in infrared and radio observations of molecular cloud cores, the scenario of starformation seems to have been almost completed. However, the study of dark clouds as a whole, which is a stage of the starformation drama, is observationally insufficient. In order to understand the environment of a starforming region, it is important to study the large scale structures of dark clouds. And that gives the information about formation and destruction mechanism of dark clouds.

Some comments about observations and image processing of comet 29P/Schwassmann-Wachmann 1

1999 ◽  
Vol 173 ◽  
pp. 243-248
Author(s):  
D. Kubáček ◽  
A. Galád ◽  
A. Pravda
Keyword(s):  
Image Processing ◽  
Large Scale ◽  
Harvard College ◽  
Oak Ridge ◽  
Large Scale Structures ◽  
Short Period Comet ◽  
Short Period ◽  
Scale Structures ◽  
Harvard College Observatory ◽  
Period Comet

AbstractUnusual short-period comet 29P/Schwassmann-Wachmann 1 inspired many observers to explain its unpredictable outbursts. In this paper large scale structures and features from the inner part of the coma in time periods around outbursts are studied. CCD images were taken at Whipple Observatory, Mt. Hopkins, in 1989 and at Astronomical Observatory, Modra, from 1995 to 1998. Photographic plates of the comet were taken at Harvard College Observatory, Oak Ridge, from 1974 to 1982. The latter were digitized at first to apply the same techniques of image processing for optimizing the visibility of features in the coma during outbursts. Outbursts and coma structures show various shapes.

Large-Scale Structures in a Compressible Mixing Layer over a Cavity

AIAA Journal ◽  
2003 ◽  
Vol 41 (12) ◽  
Author(s):  
Jonathan Poggie ◽  
Alexander J. Smits
Keyword(s):  
Large Scale ◽  
Mixing Layer ◽  
Compressible Mixing Layer ◽  
Large Scale Structures ◽  
Scale Structures

scholarly journals The organization and control of an evolving interdependent population

2015 ◽  
Vol 12 (108) ◽  
pp. 20150044 ◽  
Author(s):  
Dervis C. Vural ◽  
Alexander Isakov ◽  
L. Mahadevan
Keyword(s):  
Evolutionary Game Theory ◽  
Large Scale ◽  
Social Evolution ◽  
Evolutionary Game ◽  
Large Scale Structures ◽  
External Perturbations ◽  
Emergence Of Cooperation ◽  
Scale Structures ◽  
And Control ◽  
Evolutionarily Stable

Starting with Darwin, biologists have asked how populations evolve from a low fitness state that is evolutionarily stable to a high fitness state that is not. Specifically of interest is the emergence of cooperation and multicellularity where the fitness of individuals often appears in conflict with that of the population. Theories of social evolution and evolutionary game theory have produced a number of fruitful results employing two-state two-body frameworks. In this study, we depart from this tradition and instead consider a multi-player, multi-state evolutionary game, in which the fitness of an agent is determined by its relationship to an arbitrary number of other agents. We show that populations organize themselves in one of four distinct phases of interdependence depending on one parameter, selection strength. Some of these phases involve the formation of specialized large-scale structures. We then describe how the evolution of independence can be manipulated through various external perturbations.

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