Results 111 to 120 of about 287,878 (297)

Event-Driven Connected Vehicular Platoon Control With Mixed Time-Varying Delay

IEEE Access, 2019
In this research, connected vehicular platoon control is investigated with mixed time-varying delay. An event-driven information interaction method for connected vehicular platoon system is built, which considered the combined effect of communication ...
Cunming Zou, Hongxing Li
doaj   +1 more source

Data‐Driven Discovery of Quaternary Ammonium Interlayers for Efficient and Thermally Stable Perovskite Solar Cells

Advanced Materials, EarlyView.
An active learning framework, grounded in independently generated in‐house experimental data, enables reliable discovery of high‐performance interfacial materials for perovskite solar cells. Iterative model refinement autonomously converges toward structurally robust quaternary ammonium architectures, establishing a new design principle for interfacial
Jongbeom Kim, Yang Jeong Park, Chaehoon Jeon, Nahye Shin, Jaewang Park, Seungun Lee, Jino Im, Sungroh Yoon, Sang Il Seok   +8 more
wiley   +1 more source

Spinning Strings, Black Holes and Stable Closed Timelike Geodesics

, 2008
The existence and stability under linear perturbation of closed timelike curves in the spacetime associated to Schwarzschild black hole pierced by a spinning string are studied. Due to the superposition of the black hole, we find that the spinning string
B. Jensen, B.R. Steadman, E. Cartan, F.J. Tipler, G.J. Galloway, H.H. Soleng, I.D. Soares, J. Hadamard, J. Pfarr, J.R. Gott, M. Aryal, M. Guerdiri, M. Gürses, P. Sousa de, P.S. Letelier, P.S. Letelier, P.S. Letelier, P.S. Letelier, Patricio S. Letelier, R.J. Gleiser, R.J. Petti, S. Deser, S. Hawking, V.M. Rosa, V.M. Rosa, Valéria M. Rosa, W.B. Bonnor, Y.M. Cho, Ø. Grøn   +28 more
core   +2 more sources

Recent Advances in Electrospun Nanofibers for Triboelectric Nanogenerators: Performance Enhancement Strategies and Emerging Applications

Advanced Materials, EarlyView.
This review highlights recent advances in electrospun nanofiber‐based triboelectric nanogenerators, emphasizing how material design, fiber architecture, and interface engineering collectively enhance output performance and mechanical durability. Key developments in porous, aligned, core‐shell, and hierarchical nanofibers are discussed alongside ...
MD Fajla Rabbi, Jee Hwan Ahn, Duy Linh Vu, Kyoung Kwan Ahn   +3 more
wiley   +1 more source

A Positive Cosmological Constant in String Theory Through Ads/CFT Wormholes

, 2001
There are two important examples of physical systems which violate the strong energy condition : Universes (like, it would seem, our own) with a positive cosmological constant, and wormholes.
Aharony, Ashtekar, Balasubramanian, Barcelo, Behrndt, Besse, Borthwick, Breitenlohner, Brett McInnes, Cai, Carroll, Ceresole, Chamblin, Chamblin, Chamblin, Chamblin, De Wolfe, Deffayet, Duff, Duff, Duff, Emparan, Emparan, Fischler, Garriga, Garriga, Ghoroku, Gibbons, Gregory, Gubser, Gubser, Hawking, Hawking, Hellerman, Kallosh, Karch, Kogan, Lawson, Maldacena, McInnes, McInnes, McInnes, Nojiri, Nojiri, Nojiri, Randall, Seiberg, Susskind, Susskind, Visser, Witten, Witten, Witten, Witten, Witten   +54 more
core   +1 more source

A Comment on the Stability of String Monopoles [PDF]

, 1993
In recent work a multimonopole solution of heterotic string theory was obtained. The monopoles are noted to be stable, in contrast with analogous solutions of Einstein-Maxwell or Yang-Mills-dilaton theory.
Bartnik, Bergshoeff, Bergshoeff, Bizon, Callan, Callan, Callan, Charap, Dabholkar, Dine, Duff, Duff, Felce, Gauntlett, Gross, Khuri, Khuri, Khuri, Khuri, Lavrelashvili, Lee, Ramzi R. Khuri, Sorkin, Strominger   +23 more
core   +3 more sources

Evolution of Materials and Device Stacks for HfO2‐Based Ferroelectric Memories

Advanced Materials Interfaces, EarlyView.
This review summarizes engineering strategies for HfO2 based ferroelectric memories with focus on FeCAP and FeFET structures. It describes how dopant design, stress effects, and interface engineering improve the bulk ferroelectric response. It further discusses how channel engineering supports reliable memory characteristics and scalable integration ...
Eunjin Kim, Jiyong Woo
wiley   +1 more source

String Stability of Vehicle Platoons Under Oscillatory Perturbations in Car-Following Models

IEEE Open Journal of Vehicular Technology
Platooning is a key enabling technology for connected and automated vehicles, but its effectiveness depends critically on string stability, i.e., the ability to prevent disturbance amplification along the vehicle string.
Oumaima Barhoumi, Ghazal Farhani, Taufiq Rahman, Mohamed H. Zaki, Sofiene Tahar   +4 more
doaj   +1 more source

Evaluation of robust indoor platoon driving system of welfare personal vehicles by using model error compensator

Nihon Kikai Gakkai ronbunshu, 2016
In aging society, welfare personal vehicles have been widely used to improve the quality of life of elderly and handicapped persons. However, it is difficult for the users to steer the vehicle in narrow buildings.
Tatsuya SUGANO, Yusuke DAN, Hiroshi OKAJIMA, Nobutomo MATSUNAGA   +3 more
doaj   +1 more source

Vehicle platoons with ring coupling [PDF]

, 2005
We design a control strategy for platoons of identical vehicles. It is assumed that each vehicle measures the distance with its immediate forward neighbor.
Aeyels, Dirk, Rogge, Jonathan
core   +1 more source