Results 231 to 240 of about 302,461 (263)

On the square root of minkowski space

Physics Letters A, 1982
Abstract A vector space of eight-dimensional complex spinors ψ is constructed which is in a sense a square root of Minkowski space. The usual position, momentum and angular momentum variables of a particle of non-zero rest mass and arbitrary spin are given as expectation values with respect to ψ of appropriate 8 × 8 matrices.
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The Nuclear Roots of the Space Race

2020
The creation of the first intercontinental ballistic missiles (ICBM) by the United States Air Force and the military of the Soviet Union in the 1950s was an important prerequisite to the military and civilian space programs that soon followed. ICBMs quickly became used both as weapons and for the more peaceful purpose of launching spacecraft into earth
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Air-spaces in the roots of some monocotyledons

Proceedings / Indian Academy of Sciences, 1962
The origin and development of air chambers in four monocotyledons studied fall under three categories:
Ambuja Pillai, S. K. Pillai
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Root Clustering in Parameter Space

1990
Review of classical results.- to root clustering.- Transformable regions.- Root clustering criteria.- Symmetric matrix approach.- Parameter space and feedback design.
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Relativistic square-root spaces∗

2013
AbstractEinstein's derivation of the Lorentz transformation between space and time coordinates is given. The resulting relativistic kinematics of £  Lorentz spacetime and momentum-energy vectors is readily applied to practical problems by using their scalar products that are Lorentz-invariant, the same in every Lorentz frame.
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Dowel space management in obstructed root canals

The Journal of Prosthetic Dentistry, 1994
A modified instrument developed from readily available materials to provide dentists with a multifaceted system to eliminate obstructions from root canals and provide space for a dowel core restoration is presented.
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Toward refining and contextualizing the root economics space

Trends in Ecology & Evolution
The trait-based 'root economics space' (RES) offers a framework for understanding plant belowground strategies. It is structured along two axes: a 'fast-slow' conservation gradient and a 'do-it-yourself to outsourcing' collaboration gradient. However, growing evidence reveals divergent dominant trait combinations structuring the RES axes across plant ...
Liang Kou, Wanyu Zuo, Grégoire T. Freschet, Jiajia Zheng, Ning Ma, Hans Lambers, Shenggong Li, Huimin Wang   +7 more
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Root section in the submaxillary space

Oral Surgery, Oral Medicine, Oral Pathology, 1973
B J, Dormer, J A, Babett
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ROOT SPACE UNDERNEATH TRAFFIC LANES

Arboricultural Journal, 2008
Summary Tree roots need certain essential conditions for optimal growth. These include, for instance: enough space, enough ground air ventilation and moisture, sufficient amounts of macro- and micro-nutrients, as well as the existence of symbionts. However, these conditions are not always found at potential rooting zones for urban street trees. Rooting
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Root phosphatase activity aligns with the collaboration gradient of the root economics space

New Phytologist, 2022
Jianrong Su, Biao Zhu, Ying Chen
exaly