scholarly journals Life on earth – An accident? Chiral symmetry and the anthropic principle

2014 ◽  
Author(s):  
Ulf-G. Meißner ◽  
Keyword(s):  
Chiral Symmetry ◽  
Anthropic Principle ◽  
Life On Earth

scholarly journals Life on earth — An accident? Chiral symmetry and the anthropic principle

2014 ◽  
Vol 23 (07) ◽  
pp. 1461005 ◽  
Author(s):  
Ulf-G. Meißner ◽  
Keyword(s):  
Chiral Symmetry ◽  
Big Bang ◽  
Anthropic Principle ◽  
Fine Tuning ◽  
Nuclear Forces ◽  
Life On Earth ◽  
The Big Bang

I discuss the fine-tuning of the nuclear forces and in the formation of nuclei in the production of the elements in the Big Bang and in stars.

Three Lives and Astrobiology

2020 ◽  
pp. 57-78 ◽  
Author(s):  
Lucas Mix
Keyword(s):  
Anthropic Principle ◽  
Biological Organization ◽  
Cellular Life ◽  
Hard Problems ◽  
Life On Earth ◽  
Different Origins ◽  
Three Lives

This chapter explores the concept of life across traditions, from science to philosophy to theology. The term “life” covers at least three constellations of meaning or life-concepts: biological life, internal life, and rational life. Biological life shares traits with all cellular life on Earth (archaea, eubacteria, and eukarya). Internal or conscious life shares subjective interiority with humans. Rational life shares intellect with all minds that can distinguish truth from non-truth. These three lives possess different origins, extents, and futures. The chapter then identifies three distinct “hard problems of life” relating to the origin and extent of biological organization, consciousness, and reason: moving from non-life to life, from life to sentience, and from sentience to rationality. The Drake equation, the Fermi paradox, and the anthropic principle provide concrete examples in astrobiology.

Is There Unintelligent Life on Earth?

1980 ◽  
Vol 25 (12) ◽  
pp. 991-992
Author(s):  
J. M. WARREN
Keyword(s):  
Life On Earth

Review of the Current State and Future Development in Standardizing Natural Lighting in Interiors

2018 ◽  
pp. 5-26 ◽  
Author(s):  
Stanislav Darula
Keyword(s):  
Human Life ◽  
Natural Light ◽  
Artificial Lighting ◽  
Computer Tools ◽  
Natural Lighting ◽  
Current State ◽  
Minimum Requirements ◽  
Life On Earth ◽  
Window Design

Three elements mainly wind, water and sun seemed to determine in ancient ages the basic phenomena of life on Earth. Architectural history documented the importance of sun influence on urban and building construction already in layouts of Mesopotamian and Greek houses. Not only sun radiation but especially daylight played a significant role in the creation of indoor environment. Later, in the 20th century, a search of interaction between human life in buildings and natural conditions were studied considering well­being and energy conscious design recently using computer tools in complex research and more detail interdisciplinary solutions. At the same time the restricted daytime availability of natural light was supplemented by more efficient and continually cheaper artificial lighting of interiors. There are two main approaches to standardize the design and evaluation of indoor visual environment. The first is based on the determination of the minimum requirements respecting human health and visibility needs in all activities while the second emphasizes the behaviour and comfort of occupants in buildings considering year­around natural changes of physical quantities like light, temperature, noise and energy consumption. The new current standardization basis for daylight evaluation and window design criteria stimulate the study of methodology principles that historically were based on the overcast type of sky luminance pattern avoiding yearly availability of sky illuminance levels. New trends to base the daylight standardization on yearly or long­term availability of daylight are using the averages or median sky illuminance levels to characterise local climatological conditions. This paper offers the review and discussion about the principles of the natural light standardization with a short introduction to the history and current state, with a trial to focus on the possible development of lighting engineering and its standards in future.

Making the Différance: Between Derrida and Stiegler

Derrida Today ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 1-16
Author(s):  
Francesco Vitale
Keyword(s):  
Natural Condition ◽  
Ecological Crisis ◽  
Human Being ◽  
Effective Response ◽  
Life On Earth

This paper intends to verify the extent and effectiveness of the transforming appropriation of the Derridean concept of ‘differance’ by Stiegler with respect to the problems that, according to Stiegler, make this creative critical operation necessary; in particular with respect to the most recent question concerning the possibility of thinking about and putting into practice a ‘neganthropological différance’ capable of facing the ecological crisis that today seems to threaten the very existence of life on earth. The paper goes back to Technics and Time 1. to analyze the distinction between ‘vital difference’ and ‘noetic difference’ that constitutes the condition of possibility of the ‘neganthropological différance.’ In this perspective, the distinction proposed by Stiegler seems to re-propose the hierarchically oriented oppositional structure that characterizes metaphysical thought and in particular the opposition between man and animal, attributing to the human being the ability to free himself from the constraints of his biological-natural condition. Finally, the paper attempts to account for the repercussions of this approach on the very possibility of an effective response to the ecological crisis, concluding with a provocation regarding the role that theory can and must play with regard to such an urgent and far-reaching problem.

Chiral symmetry and the properties of hadrons in the Generalized Nambu—Jona-Lasinio model

2016 ◽  
Vol 187 (07) ◽  
pp. 715-743
Author(s):  
Yuliya S. Kalashnikova ◽  
Aleksei V. Nefed'ev ◽  
J.E.F.T. Ribeiro
Keyword(s):  
Chiral Symmetry
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