Zobrazeno 1 - 10
of 375
pro vyhledávání: '"Weiner, Joel"'
Autor:
Farrah, Duncan, Croker, Kevin S., Tarlé, Gregory, Faraoni, Valerio, Petty, Sara, Afonso, Jose, Fernandez, Nicolas, Nishimura, Kurtis A., Pearson, Chris, Wang, Lingyu, Zevin, Michael, Clements, David L, Efstathiou, Andreas, Hatziminaoglou, Evanthia, Lacy, Mark, McPartland, Conor, Pitchford, Lura K, Sakai, Nobuyuki, Weiner, Joel
Publikováno v:
ApJL 944 L31 (2023)
Observations have found black holes spanning ten orders of magnitude in mass across most of cosmic history. The Kerr black hole solution is however provisional as its behavior at infinity is incompatible with an expanding universe. Black hole models
Externí odkaz:
http://arxiv.org/abs/2302.07878
We present a new approach to constrained classical fields that enables the action formalism to dictate how external sources must enter the resulting equations of motion. If symmetries asserted upon the varied fields can be modeled as restrictions in
Externí odkaz:
http://arxiv.org/abs/2203.13826
Autor:
Croker, Kevin S., Weiner, Joel L.
Publikováno v:
ApJ 882 19 (2019)
We show that derivation of Friedmann's equations from the Einstein-Hilbert action, paying attention to the requirements of isotropy and homogeneity during the variation, leads to a different interpretation of pressure than what is typically adopted.
Externí odkaz:
http://arxiv.org/abs/2107.06643
Autor:
Weiner, Joel L.
Publikováno v:
Gen Relativ Garvit 53, 34 (2021)
We generalize Birkhoff's Theorem in the following fashion. We find necessary and sufficient conditions for any spherically symmetric space-time to be static in terms of the eigenvalues of the stress-energy tensor. In particular, we generalize the Tol
Externí odkaz:
http://arxiv.org/abs/2103.12178
Autor:
Simmons, Walter, Weiner, Joel L.
The protein folding problem must ultimately be solved on all length scales from the atomic up through a hierarchy of complicated structures. By analyzing the stability of the folding process using physics and mathematics, this paper shows that featur
Externí odkaz:
http://arxiv.org/abs/1505.07153
Autor:
Simmons, Walter, Weiner, Joel L.
Processes that proceed reliably from a variety of initial conditions to a unique final form, regardless of moderately changing conditions, are of obvious importance in biophysics. Protein folding is a case in point. We show that the action principle
Externí odkaz:
http://arxiv.org/abs/1307.0536
Autor:
Simmons, Walter, Weiner, Joel L.
We adopt the point of view that analysis of the stability of the protein folding process is central to understanding the underlying physics of folding. Stability of the folding process means that many perturbations do not disrupt the progress from th
Externí odkaz:
http://arxiv.org/abs/1112.6190
Autor:
Simmons, Walter, Weiner, Joel L.
The energy for protein folding arises from multiple sources and is not large in total. In spite of the many specific successes of energy landscape and other approaches, there still seems to be some missing guiding factor that explains how energy from
Externí odkaz:
http://arxiv.org/abs/1108.2740
Autor:
Weiner, Joel Laevin
Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1995.
Includes bibliographical references (p. 91-94).
by Joel Laevin Weiner.
M.C.P.
Includes bibliographical references (p. 91-94).
by Joel Laevin Weiner.
M.C.P.
Externí odkaz:
http://hdl.handle.net/1721.1/70692
Autor:
Simmons, Walter A., Weiner, Joel L.
A geometric analysis of protein folding, which complements many of the models in the literature, is presented. We examine the process from unfolded strand to the point where the strand becomes self-interacting. A central question is how it is possibl
Externí odkaz:
http://arxiv.org/abs/0809.2079