Results 11 to 20 of about 4,641,331 (294)
Building a flagellum in biological outer space [PDF]
Microbial Cell, 2014 Flagella, the rotary propellers on the surface of bacteria, present a paradigm for how cells build and operate complex molecular ‘nanomachines’. Flagella grow at a constant rate to extend several times the length of the cell, and this is achieved by ...
Lewis D. B. Evans +2 more
doaj +2 more sources
Peckham Outer-Space Initiative
, 2011 "In Ships Not Shelters, the Peckham Outer-Space Initiative (POI) has produced a publication creatively renouncing the stasis inherent in the idea of a shelter, and instead embracing the ship as a vehicle (physically, mentally) for some diagonal forward ...
Feo, Roberto +3 more
core +7 more sources
Global Sustainability, 2019 This article raises awareness of how countries can leverage space and space technologies to achieve the Sustainable Development Goals (SDGs) through concrete examples.
Simonetta Di Pippo
doaj +1 more source
Metric properties of Outer Space [PDF]
Publicacions Matemàtiques, 2011 We define metrics on Culler-Vogtmann space, which are an analogue of the Teichmuller metric and are constructed using stretching factors. In fact the metrics we study are related, one being a symmetrised version of the other. We investigate the basic properties of these metrics, showing the advantages and pathologies of both choices.
FRANCAVIGLIA, STEFANO, A. Martino
openaire +7 more sources
War and peace in outer space ::law, policy, and ethics /
, 2021 This work explores the legal and ethical issues surrounding the increased weaponization of outer space and the potential for space-based conflict. The essays included explore the moral and legal issues in four sections covering the legal framework ...
Steer, Cassandra +3 more
core +1 more source
Axioms, 2015 A.M. Mathai is Emeritus Professor of Mathematics and Statistics at McGill University, Canada. He is currently the Director of the Centre for Mathematical and Statistical Sciences India.
Hans J. Haubold, Arak M. Mathai
doaj +1 more source
On the q-Laplace Transform and Related Special Functions
Axioms, 2016 Motivated by statistical mechanics contexts, we study the properties of the q-Laplace transform, which is an extension of the well-known Laplace transform. In many circumstances, the kernel function to evaluate certain integral forms has been studied. In
Shanoja R. Naik, Hans J. Haubold
doaj +1 more source
PING-PONG AND OUTER SPACE [PDF]
Journal of Topology and Analysis, 2010 We prove that, if φ, ψ ∈ Out (FN) are hyperbolic iwips (irreducible with irreducible powers) such that 〈φ, ψ〉 ⊆ Out (FN) is not virtually cyclic, then some high powers of φ and ψ generate a free subgroup of rank two for which all nontrivial elements are again hyperbolic iwips.
Kapovich, Ilya, Lustig, Martin
openaire +2 more sources
Groups, Geometry, and Dynamics, 2018 We characterize strongly Morse quasi-geodesics in Outer space as quasi-geodesics which project to quasi-geodesics in the free factor graph. We define convex cocompact subgroups of Out (F_n) as subgroups such that an orbit map in the free factor ...
Ursula Hamenstädt, Sebastian Hensel
openaire +2 more sources
RELATIVE TWISTING IN OUTER SPACE [PDF]
Journal of Topology and Analysis, 2012 Subsurface projection is indispensable to studying the geometry of the mapping class group and the curve complex of a surface. When the subsurface is an annulus, this projection is sometimes called relative twisting. We give two alternate versions of relative twisting for the outer automorphism group of a free group.
Clay, Matt, Pettet, Alexandra
openaire +2 more sources