Results 51 to 60 of about 287,878 (297)

Radially stabilized inflating cosmic strings [PDF]

Physical Review D, 2015
In General Relativity, cosmic strings are well known to produce a static, locally flat spacetime with a wedge removed. If the tension exceeds a critical value, the deficit angle becomes larger than $ 2 $, leading to a compact exterior that ends in a conical singularity.
Niedermann, Florian, Schneider, Robert
openaire   +2 more sources

A Dynamics-Based Adaptive String Stable Controller for Connected Heavy Road Vehicle Platoon Safety

IEEE Access, 2020
This article presents a string stable controller for the autonomous operation of a platoon of Heavy Commercial Road Vehicles (HCRVs) in a connected environment.
K. B. Devika, G. Rohith, Venkata Ramani Shreya Yellapantula, Shankar C. Subramanian   +3 more
doaj   +1 more source

Event-Triggered Vehicle Platoon Control Under Random Communication Noises

IEEE Access, 2021
As an effective way of improving traffic efficiency, vehicle platoon control has attracted extensive interest recently. Communication between vehicles tends to be affected by communication noises.
Haifeng Li, Zhenping Chen, Baochuan Fu, Zhengtian Wu, Xinhui Ji, Manman Sun   +5 more
doaj   +1 more source

Exactly stable non-BPS spinors in heterotic string theory on tori

, 2012
Considering SO(32) heterotic string theory compactified on a torus of dimension 4 and less, stability of non-supersymmetric states is studied. A non-supersymmetric state with robust stability is constructed, and its exact stability is proven in a large ...
A Sen, A Sen, A Sen, A Sen, A Sen, A Sen, B Stefanski Jr, DJ Gross, E Witten, E Witten, E Witten, J Maiden, J Majumder, J Polchinski, Jihye Seo, K Narain, K Narain, M Bianchi, MR Gaberdiel, MR Gaberdiel, N Quiroz, O Bergman, O Bergman, O Bergman, P Hořava, PH Ginsparg, S Mukhi, S Mukhi   +27 more
core   +1 more source

STABILITY OF AdS BLACK STRINGS [PDF]

International Journal of Modern Physics A, 2009
We review the recent developements in the stability problem and phase diagram for asymptotically locally AdS black strings. First, we quickly review the case of locally flat black string before turning to the case of locally AdS spacetimes.
openaire   +2 more sources

Sampled-Data Cooperative Adaptive Cruise Control for String-Stable Vehicle Platooning with Communication Delays: A Linear Matrix Inequality Approach

Machines
This study aims to propose a sampled-data control technique, utilizing a linear matrix inequality (LMI) approach, to achieve string-stable vehicle platooning in a cooperative adaptive cruise control (CACC) system with communication delays.
Yong Hoon Jang, Han Sol Kim
doaj   +1 more source

Safety Evaluation Method of Gas Well Pipe String Stability in Snubbing Operations

Shiyou jixie, 2023
In order to realize the active control of pipe string safety in gas well snubbing operations and prevent the shale gas blowout accidents caused by pipe string instability,based on mechanical analysis and considering the influences of complex factors such
Fu Biwei, Wei Menghui, Yang Chao
doaj  

Tree-Level Stability Without Spacetime Fermions: Novel Examples in String Theory [PDF]

, 2007
Is perturbative stability intimately tied with the existence of spacetime fermions in string theory in more than two dimensions? Type 0'B string theory in ten-dimensional flat space is a rare example of a non-tachyonic, non-supersymmetric string theory ...
A. Fotopoulos, A. Giveon, A. Giveon, A. Sagnotti, C. Angelantonj, C. Bachas, C.G. Callan Jr., D. Burshtyn, D. Israel, D. Israel, D. Kutasov, D. Kutasov, Dan Israël, I. Brunner, I. Brunner, J. Gomis, K. Hosomichi, M.R. Douglas ., M.R. Gaberdiel, N. Itzhaki, O. Aharony, O. Bergman, P. Di Vecchia, S. Coleman, S. Murthy, S. Murthy, S. Murthy, S.K. Ashok, T. Takayanagi, V. Niarchos, Vasilis Niarchos, Y. Nakayama   +31 more
core   +5 more sources

Heavy Road Vehicle Platoon Control Considering Brake Fade With Adaptive Mass and Road Gradient Estimation

IEEE Access, 2022
Heavy commercial road vehicle (HCRV) platoons are viable logistic solutions to freight movement. During long haul platoon operation, it is common to encounter roads of different gradients.
K. B. Devika, G. Rohith, Shankar C. Subramanian   +2 more
doaj   +1 more source

Open Heterotic Strings

, 2005
We classify potential cosmic strings according to the topological charge measurable outside the string core. We conjecture that in string theory it is this charge that governs the stability of long strings.
A. Sen, A. Sen, A.D. Sakharov, D.B. Fairlie, E. Witten, E.J. Copeland, J.A. Harvey, J.C. Baez, Joseph Polchinski, K. Becker, K. Olsen, M.J. Duff, N. Arkani-Hamed, N. Moeller, S.H. Shenker, T. Banks, T.W.B. Kibble, V.A. Rubakov   +17 more
core   +2 more sources